Navigation General

A safe water mark may be _______________.

If your vessel were proceeding up river (ascending), the port side of the channel would be marked according to the U. S....

What is the basic principle of the magnetic compass?

Under the IALA-A Buoyage System, when entering from seaward, a buoy indicating the preferred channel is to starboard may...

The Light List shows that a navigational light has a nominal range of 10 miles and a height above water of 38 feet (11.6...

On a Mercator chart, 1 nautical mile is equal to _______________.

An occulting light is one in which _______________.

At the outbreak of war your ship is caught in an enemy port. Which statement is FALSE?

All persons or vessels within the lock area, including the lock approach channels, come under the authority of the ____...

The annual change in variation for an area can be found in _______________.

The National Geospatial-Intelligence Agency (formerly the National Imagery and Mapping Agency) would produce a chart of...

The Light List indicates that a light has a nominal range of 13 miles and is 36 feet high (11.0 meters). If the visibili...

Which compensates for induced magnetism in the horizontal soft iron of a vessel?

Which publication would describe the explosive anchorages in the ports on the east coast of the United States?

In the U.S. Aids to Navigation System on the Western Rivers, a preferred channel buoy to be left to port while proceedi...

In a national emergency, when communicating via the Navy, messages are sent by precedence. A message designated FLASH w...

When a buoy is in position only during a certain period of the year, where may the dates when the buoy is in position be...

Which buoy may be even numbered?

A vessel heading WSW is on a course of _______________.

Buoys which only mark the left or right side of the channel will never exhibit a light with which characteristic?

A harbor chart could have a scale of _______________.

On navigational aids, what does the light characteristic "Fl(2+1

Under the IALA Buoyage Systems, safe water marks may show a _______________.

The draw span of a floating drawbridge may be marked with _______________.

The Light List shows that a navigational light has a nominal range of 6 miles and a height above water of 18 feet (5.5 m...

Lighted white and orange buoys must show which color light?

The datum from which the predicted heights of tides are reckoned in the tide tables is _______________.

What is the approximate geographic range of Southwest Ledge Light, Connecticut, if your height of eye is 32 feet (9.8 me...

The Light List Does NOT contain information on _______________.

In the U.S. Aids to Navigation System on the Western Rivers, the light characteristic of group flashing (2

On the Mississippi River, gage zero is the gage reading measured from the _______________.

Where would you expect to find climatological and meteorological tables for the Gulf Coast area?

Distance along a track line is measured on a Mercator chart by using the _______________.

Which symbol represents a 2-fathom curve?

Under the IALA-B Buoyage System, a buoy displaying a red light will _______________.

Complete information on weather broadcasts throughout the world is contained in _______________.

Solid green arrows on the main body of a pilot chart indicate _______________.

You are outbound in a buoyed channel on course 015°T. You sight a white light showing a Morse

In order to utilize the capacity of a lock to its maximum, pleasure craft are locked through with all of the following ...

Your vessel's operators send a message that your vessel has been consigned to Voluntary Naval Control of Shipping. The ...

Which statement concerning the chartlet in illustration D010NG below is true? (Soundings and heights are in meters) ...

A nun buoy will _______________.

In which country would you expect the channels to be marked with the IALA-B Buoyage System?

In Region A of the IALA Buoyage System, when entering from seaward, the port side of a channel would be marked by a ___...

The following types of vessels are awaiting lockage on the upper Mississippi. Which type of vessel is normally passed th...

While steaming on course 280°T, you sight a buoy showing a very quick flashing (VQ) white light well to port. Maintainin...

Entering from sea, a daymark on the port side of the channel would be indicated on a chart by a _______________.

When entering from seaward, a buoy displaying a composite group (2+1

Some lights used as aids to marine navigation have a red sector to indicate a danger area. The limits of a colored secto...

Which publication contains information on Naval Control of Shipping (NCS) in time of emergency or war?

A daymark used to indicate the starboard side of the channel when approaching from seaward will have the shape indicated...

The Light List shows a lighted aid to navigation on the left bank. This means that the light can be seen on the starboa...

The Light List indicates that a light has a nominal range of 20 miles and is 52 feet (16 meters) high. If the visibility...

Which of the following is a characteristic of a lighted cardinal mark?

A vessel heading WNW is on a course of _______________.

The maritime radio system consisting of a series of coast stations transmitting coastal warnings is called ____________...

While proceeding along the Norwegian coast on course 039°T, you sight the black- yellow-black banded buoy shown in illus...

The shoreline on charts generally represents the mean _______________.

Magnetic information on a chart may be _______________.

You are underway on course 142°T when you sight a buoy bearing 105°T. The buoy's white light has a characteristic of con...

The heading of a vessel is indicated by what part of the compass?

Where would you obtain data on currents for areas of the world not covered by the U.S. National Ocean Service? ...

Lighted information markers show _______________.

In which country would you expect the channels to be marked with the IALA-B Buoyage System?

If the gyrocompass error is east, what describes the error and the correction to be made to gyrocompass headings to obta...

In a national emergency, when communicating via the Navy, messages are sent by precedence. A message designated PRIORI...

What is the compass course of a vessel heading NNW?

The light characteristic of flashing is used in the Aids to Navigation System on the Western Rivers for lights on _____...

The Light List shows that a navigational light has a nominal range of 22 miles and a height above water of 48 feet (14.6...

The Light List indicates that a light has a nominal range of 13 miles and is 36 feet high. If the visibility is 17 miles...

You sight a buoy fitted with a double-sphere topmark. If sighted at night, this buoy would show a _______________.

The Light List indicates that a light has a nominal range of 14 miles and is 42 feet high (12.8 meters). If the visibili...

Coast Pilots and navigational charts are kept corrected and up-to-date by using the _______________.

You are in a buoyed channel at night and pass a lighted buoy with an irregular characteristic. You should report this ...

When a light is first seen on the horizon it will disappear again if the height of eye is immediately lowered several fe...

What is a characteristic of cardinal marks?

A daymark used as a special mark is indicated by which letter in illustration D045NG below?

A lighted preferred-channel buoy may show a _______________.

You are underway in the North Sea on course 216°T when you sight a buoy bearing 021° relative. Under the IALA Buoyage S...

The refraction correction table given in the Nautical Almanac is based on a standard or average atmospheric density with...

On a chart, the characteristic of the light on a lighthouse is shown as flashing white with a red sector. The red secto...

Some lights used as aids to marine navigation have a red sector to indicate a danger area. How are the limits of a color...

Light Lists for coastal waters are _______________.

You will be advised of any hazardous areas due to the fallout of a nuclear explosive by a message with the code word __...

You are underway on course 328°T when you sight a buoy broad on your port bow. You are in the best navigable water if ...

What is the compass course of a vessel heading ENE?

Under the IALA-B Buoyage System, a conical buoy will be _______________.

What is NOT a characteristic of cardinal marks?

Sometimes foreign charts are reproduced by NGA. On such a chart, a wire-dragged, swept area may be shown in green or __...

In which publication could you find information concerning the minimum lighting required for bridges on U.S. waters? ...

If you were sailing in the North Pacific and were interested in the ice and iceberg limits, you could find this informa...

You are on course 090°T when you sight a flashing white light with a characteristic of VQ(9

Two navigational hazards are located near to each other, but each is marked by an individual cardinal buoyage system. Th...

A vessel heading SSW is on a course of _______________.

You are proceeding under NCS (Naval Control of Shipping) when it becomes necessary to send a distress message. Which pre...

How is the annual rate of change for magnetic variation shown on a pilot chart?

You are steaming along the coast of Ireland in the Irish Sea. You sight a lighted buoy with a white flashing light show...

A vessel heading SSE is on a course of _______________.

An orange and white buoy marking an area where operating restrictions are in effect will be marked with which symbol? ...

Which item in illustration D034NG below shows an occulting light?

Information about the pilotage available at Miami harbor may best be obtained from which publication?

Which light combination does NOT indicate a navigational channel passing under a fixed bridge?

The Light List shows a lighted aid to navigation on the left bank. This means that the light can be seen on the port si...

Which light characteristic may be used on a special purpose mark?

What volume of the Coast Guard Light List is used for the Mississippi River system?

Which agency maintains federal aids to navigation?

The population of northern right whales, an endangered species, numbers approximately _______________.

When displayed under a single-span fixed bridge, red lights indicate _______________.

Chart correction information is NOT disseminated through the _______________.

All straight lines represent great circle tracks on a chart based on a(n) _______________.

Red sectors of navigation lights warn mariners of _______________.

Information for updating nautical charts is primarily found in the _______________.

On a nautical chart, the inner ring of a compass rose indicates _______________.

Under the IALA Buoyage Systems, a cardinal mark may NOT be used to _______________.

On a transpacific voyage, you receive a message from your vessel's operators saying that your vessel has been consigned ...

You are downbound on the Ohio River locking through Greenup. The chamber has been emptied and the lower gates are open. ...

Which topmark shown in illustration D023NG below identifies an isolated danger?

When entering from seaward, a buoy displaying a single-flashing red light indicates _______________.

Which statement is TRUE for an unlighted, red and green, horizontally-banded buoys with the topmost band red?

How many points are there in a compass card?

In waters where the cardinal system is used you would expect to find danger _______________.

Which of the buoy symbols shown in illustration D032NG below indicates a safe water mark?

A cardinal mark showing an uninterrupted quick-flashing white light indicates the deepest water in the area is on the _...

Under the IALA cardinal system, a mark with a quick white light showing 6 flashes followed by one long flash indicates ...

Which aid is NOT marked on a chart with a magenta circle?

If you observe a buoy off station you should _______________.

Under the IALA cardinal system, a mark with quick white light showing 3 flashes every 10 seconds indicates that the saf...

Which agency publishes the Light Lists?

You are steaming in a westerly direction along the Gulf Coast. You see ahead of you a lighted buoy showing a red isophas...

Mean high water is the reference plane used for _______________.

Under the U.S. Aids to Navigation System, a yellow buoy is a _______________.

A red triangular daymark marks _______________.

You are underway on course 127°T. You sight a buoy with the topmarks shown in illustration D025NG below, bearing two poi...

The luminous range of a light takes into account the _______________.

Under the IALA cardinal system, a mark with a quick light showing 9 flashes every 15 seconds indicates that the safest ...

In the North Sea area, you sight a buoy showing a quick white light showing 6 flashes followed by one long flash at 15 s...

On approaching the English Channel on course 080°T, you note the symbol YBY near a charted buoy. How should you pass th...

While proceeding along the Mediterranean coast of Spain, you sight the black and yellow buoy shown in illustration D020N...

A vertically-striped buoy may be _______________.

Information markers, when lighted, will display _______________.

Green lights may appear on _______________.

Which cardinal quadrant is represented by the topmark in illustration D024NG below?

Daymarks marking the starboard side of the channel when going towards the sea are _______________.

On a voyage along the coast of France, you sight a buoy with the top marks as shown in illustration D026NG below. How sh...

Information about temporary, short term changes affecting the safety of navigation in U.S. waters is distributed to nav...

Information on northern right whales can be found in _______________.

Descending boats, while awaiting their turn to enter a lock, shall NOT block traffic from the lock. They shall be above...

While steaming north of the Irish coast, you sight a buoy which shows the light rhythm shown in illustration D028NG belo...

During daylight hours black double-cone topmarks are the most important feature of cardinal marks. Which of the four top...

The channel under a bridge is marked with aids from the lateral system. The centerline of the channel is marked on the ...

When using a Lambert conformal chart in high latitudes, angles such as bearings are measured in reference to __________...

What is a "Special Warning"?

A vessel sighting a northern right whale dead ahead should _______________.

Navigational marks used for informational or regulatory purposes are _______________.

In the North Sea area, you sight a buoy showing a quick white light with 6 flashes, followed by one long flash at 15 sec...

In the North Sea area, you sight a buoy showing a quick white light with 9 flashes every 15 seconds. Which of the four t...

If within 500 yards (460m) of a Northern Right Whale you are lawfully obligated to _______________.

The Light List shows that a navigational light has a nominal range of 19 miles and a height above water of 52 feet (15.8...

What is characteristic of an isophase light?

The Light List shows that a navigational light has a nominal range of 5 miles and a height above water of 21 feet (6.4 m...

In the North Sea area, you sight a buoy with a quick light showing 3 flashes every 10 seconds. Which topmark in illustr...

In the North Sea area, you sight a buoy showing an uninterrupted quick-flashing white light. Which of the four topmarks ...

As your vessel is heading southward along the east coast of the United States, you encounter a buoy showing a red flashi...

Under the Uniform State Waterway Marking System a mooring buoy is painted _______________.

In the North Sea area, you sight a buoy showing a quick white light with 9 flashes every 15 seconds. Which of the four t...

You are entering an African port and see ahead of you a red can-shaped buoy. What action should you take?

What publication contains descriptions of the coast line, buoyage systems, weather conditions, port facilities, and navi...

An orange and white buoy marking a danger area will have what symbol on it?

Under the IALA-A Buoyage System, when entering from seaward a lateral system buoy to be left to port may display which t...

A pilot chart does NOT contain information about _______________.

A general chart could have a scale of _______________.

The Light List shows that a navigational light has a nominal range of 18 miles and a height above water of 22 feet (6.7 ...

Which would be the subject of a NAVAREA warning?

Under the IALA-A Buoyage System, when entering from seaward a lateral system buoy to be left to starboard may display wh...

The symbol which appears beside a light on a chart reads "Gp Fl R (2

On U.S. charts, you can tell if a named feature such as a rock (i.e. Great Eastern Rock in Block Island Sound) is subme...

Drawbridges equipped with radiotelephones display a _______________.

You are sailing south on the Intracoastal Waterway (ICW) when you sight a red nun buoy with a yellow triangle painted on...

A preferred-channel buoy will show a _______________.

Under the IALA-A Buoyage System, a green spar buoy with a triangular topmark would indicate that the buoy _____________...

A coastal chart could have a scale of _______________.

Under the IALA - A Buoyage System, a buoy used as a port hand mark would not show which light characteristic?

In which source could you find the number of a chart for a certain geographic area?

At McAlpine L & D, normal upper pool elevation is 420.0 feet MSL, equal to 12.0 feet on the upper gage. The vertical cle...

A white buoy with an orange circle marked on it indicates _______________.

What feature(s) of a daymark is (are) used to identify the beacon upon which it is mounted?

When the navigational channel passes under a fixed bridge, the edges of the channel are marked on the bridge with what l...

Under the IALA-A Buoyage system, a buoy marking the starboard side of the channel when approaching from seaward may hav...

You wish to measure the distance on a Mercator chart between a point in latitude 42°30'N and a point in latitude 40°30'...

The world is divided into NAVAREAS for the dissemination of important marine information. Which NAVAREAS include the U.S...

You are heading out to sea in a buoyed channel and see a quick flashing green light on a buoy ahead of you. In U.S. wa...

IN REGION A of the IALA Buoyage System, when entering from seaward, the starboard side of a channel would be marked by ...

Under the IALA-A Buoyage system, a buoy marking the port hand of the channel when approaching from seaward may NOT have...

The Light List shows that a navigational light has a nominal range of 15 miles and a height above water of 40 feet (12.2...

Under the IALA-A Buoyage System, a buoy indicating the preferred channel is to port would have _______________.

Under the IALA-A Buoyage System, a buoy indicating that the preferred channel is to port when entering from seaward, ca...

A lighthouse is 120 feet (36.6 meters) high and the light has a nominal range of 18 miles. Your height of eye is 42 feet...

When a buoy marks a channel bifurcation, the preferred channel is NOT indicated by _______________.

Charted depth is the _______________.

What is the length of a nautical mile?

A HYDROLANT warning would normally be sent for all of the following EXCEPT _______________.

What is a lighted safe water mark fitted with to aid in its identification?

Where would you expect to find channels marked with the IALA-A Buoyage System?

Where would you expect to find channels marked with the IALA-A Buoyage System?

Which information does the outer ring of a compass rose on a nautical chart provide?

While preparing to enter a Brazilian port, you see ahead a red and green horizontally- striped buoy. The upper band is r...

You are required to enter a lock on your voyage. Information on the lock regulations, signals, and radio communications...

The reference datum used in determining the heights of land features on most charts is _______________.

Under the U.S. Aids to Navigation System, a lighted buoy with a spherical topmark marks _______________.

When determining compass error by an azimuth of Polaris, you enter the Nautical Almanac with the _______________.

In illustration D044NG below, a pillar buoy is indicated by which letter?

Under the IALA-B Buoyage System, when entering from seaward a lateral system buoy to be left to port may display which o...

In illustration D044NG below, what type of buoy is indicated by the letter A?

Geographic range is the maximum distance at which a light may be seen under _______________.

The symbol which appears beside a light on a chart reads "Gp Fl R (2

In illustration D044NG below, what type of buoy is indicated by the letter D?

In the U.S. Aids to Navigation System, red and green horizontally-banded buoys mark _______________.

You are sailing south on the Intracoastal Waterway (ICW) when you sight a green can buoy with a yellow square painted on...

The IALA Buoyage Systems do NOT apply to _______________.

Which government agency publishes the U.S. Coast Pilot?

What is the approximate geographic range of Fenwick Island Light, Delaware, if your height of eye is 37 feet (11.6 meter...

The Coast Guard Captain of the Port has excluded all traffic from a section of a port, while a regatta is taking place....

A green buoy has a yellow triangle on it. This is a(n) _______________.

A white buoy with an open-faced orange diamond on it indicates _______________.

The Light List shows that a navigational light has a nominal range of 12 miles and a height above water of 25 feet (7.6 ...

In addition to monitoring channel 16, all Corps of Engineer locks may use as working channels _______________.

The time required for a lighted aid to complete a full cycle of light changes is listed in the Light List as the ______...

Under the IALA-A and B Buoyage Systems, a buoy with alternating red and white vertical stripes indicates ______________...

In which source could you find the vertical clearance of a bridge on the Ohio River?

What is NOT true concerning color sectors of lights?

You are steaming southward along the west coast of the United States when you sight a buoy showing a flashing green ligh...

When outbound from a U.S. port, a buoy displaying a flashing red light indicates _______________.

Which of the following traits possessed by an articulated light makes it superior to other types of buoys?

Which type of daymark is used to mark the starboard side of the channel when entering from sea?

The shoreline shown on nautical charts of areas affected by large tidal fluctuations is usually the line of mean ______...

You are in a channel inbound from sea. A daymark used to mark a channel junction when the preferred channel is to starbo...

A white buoy with an orange cross within a diamond marked on it indicates _______________.

Illustration D037NG below represents a movable dam. If there is high water and the wickets are down so that there is an ...

The National Ocean Service publishes the _______________.

An orange and white buoy indicating a vessel-exclusion area will be marked with what symbol?

Which type of daymark is used to mark the port side of the channel when entering from sea?

The period of a lighted aid to navigation refers to the _______________.

Luminous range is the _______________.

A white buoy with an orange rectangle on it is used to indicate _______________.

An orange and white buoy with a rectangle on it displays _______________.

What is the approximate geographic range of Assateague Light, VA, if your height of eye is 52 feet (15.8 meters)? Refer ...

White and orange buoys, if lighted, show which color light?

The Light List indicates that a dayboard is a type NB. You should _______________.

White lights may be found on _______________.

What is the light phase characteristic of a lighted isolated-danger mark?

A white buoy with a blue band is _______________.

A mooring buoy, if lighted, shows which color light?

A buoy marking a wreck will show a(n) _.

Normal pool elevation is the height in feet of the section of river above a dam. This height is measured from _________...

You sight a spar buoy with the topmark shown in illustration D027NG below. You must take which of the following actions?...

Buoys which mark isolated dangers are painted with alternating _______________.

Isogonic lines are lines on a chart indicating _______________.

A special mark (yellow buoy), if lighted, may exhibit which light rhythm?

Permission to leave the riverward chamber of twin locks is given by the lockmaster and consists of which sound signal? ...

Under the IALA-B Buoyage System, when entering from seaward, a buoy that should be left to port will be _______________...

Which daymark has no lateral significance?

What characteristics can be used to identify a lighthouse?

Which statement concerning the chartlet seen in illustration D010NG below is TRUE? (Soundings and heights are in meters...

What is the approximate geographic visibility of an object with a height above the water of 70 feet, for an observer wit...

Determine the approximate geographic visibility of an object, with a height above the water of 85 feet (25.9 meters), fo...

Under the U.S. Aids to Navigation System on the Western Rivers, a preferred channel buoy is _______________.

The revision date of a chart is printed on which area of the chart?

Under the IALA-B Buoyage System, when entering from seaward a lateral system buoy to be left to starboard may display wh...

The Light List shows that a navigational light has a nominal range of 17 miles and a height above water of 28 feet (8.5 ...

If your vessel were proceeding down river (descending), a green square marker with a green reflector border on the righ...

A buoy with a composite group-flashing light indicates a(n) _______________.

The nominal range of a light may be accurately defined as the maximum distance at which a light may be seen ___________...

A white diamond daymark with an orange border is a(n) _______________.

What information is NOT found in the chart title?

The draw span of a floating drawbridge may be marked with _______________.

In the U.S. Aids to Navigation System, lateral aids as seen entering from seaward will display lights with which charact...

Which buoy may be odd numbered?

The Light List indicates that a light has a nominal range of 10 miles and is 11 feet high. If the visibility is 5 miles ...

The light characteristic of composite group flashing (2 + 1

A lateral system buoy displaying a quick light _______________.

A List of Lights entry (L Fl) is a single flashing light which shows a long flash of not less than _______________.

A buoy having red and green horizontal bands would have a light characteristic of _______________.

Which buoy is NOT numbered?

The four standard light colors used for lighted aids to navigation are red, green, white, and _______________.

A preferred-channel buoy may be _______________.

Which buoy will NOT display white retro-reflective material?

When approaching a preferred-channel buoy, the best channel is NOT indicated by the _______________.

Preferred channel buoys indicate the preferred channel to transit by _______________.

Red lights may appear on _______________.

As you enter a channel from seaward in a U.S. port, the numbers on the starboard side buoys _______________.

Your vessel is leaving New York harbor in dense fog. As the vessel slowly proceeds toward sea, you sight a green can buo...

The following boats are approaching a lock. Which has priority for locking?

The scale on a chart is given as 1:5,000,000. This means that _______________.

The height of a light is measured from which reference plane?

A lighted buoy to be left to starboard, when entering a U.S. port from seaward, shall have a _______________.

When entering from seaward, a buoy displaying a single-flashing red light indicates _______________.

You are approaching a drawbridge and have sounded the request-for-opening signal. The bridge has responded with five sho...

Which information is found in the chart title?

You are steaming southward along the west coast of the United States when you encounter a buoy showing a flashing red l...

The navigation regulations applicable to a U.S. inland waterway can be found in the _______________.

"Proceeding from seaward" for the purpose of the direction of buoying offshore, lateral system buoys would be proceedi...

Which buoy may be odd numbered?

A light having characteristics which include color variations is defined as _______________.

As you enter a U.S. channel from seaward the numbers on the buoys _______________.

When entering a channel from seaward, the numbers on buoys _______________.

What indicates a buoy that should be left to port when entering from seaward? (U.S. Aids to Navigation System)

Buoys are marked with reflective material to assist in their detection by searchlight. Which statement is TRUE?

In the IALA Buoyage System, what are buoys with alternating red and green horizontal bands used to indicate?

Safe water buoys may show ONLY _______________.

In the IALA Buoyage System, preferred-channel-to-port or preferred-channel-to- starboard buoys, when fitted with lights...

Of the four light characteristics shown in illustration D019NG below which one does NOT represent a safe water mark of t...

Under the IALA Buoyage System, which topmark shown in illustration D023NG below will be displayed on a safe watermark? ...

Charts showing the coast of Mexico are produced by the United States _______________.

How is a safe water mark, that can be passed close aboard on either side, painted and lighted?

The light rhythm of Morse

In United States waters, a buoy having red and white vertical stripes has a light characteristic of _______________.

A mid-channel buoy, if lighted, will show a _______________.

Which navigational mark may only be lettered?

A spherical buoy may be _______________.

You are approaching a drawbridge and must pass through during a scheduled closure period. What signal should you sound? ...

What is a lighted safe water mark fitted with to aid in its identification?

In the IALA Maritime Buoyage System, what is a red and white vertically-striped buoy used to indicate?

You are approaching the first of two drawbridges that span a narrow channel. The second drawbridge is close to the first...

What is the approximate geographic range of Horton Point Light, NY, if your height of eye is 40 feet (12.2 meters)? Refe...

A mountain peak charted at 700 feet breaks the horizon, and your height of eye is 12 feet. What is your approximate dis...

While proceeding downriver, you sight a red triangular-shaped daymark on the left bank. Under the U.S. Aids to Navigati...

Under the IALA Buoyage Systems, a safe water mark may NOT _______________.

Under the IALA Buoyage Systems, a spherical buoy will mark the _______________.

Under the IALA Buoyage Systems, the topmark of a red and white vertically- striped buoy shall be _______________.

Which item in illustration D034NG below shows a Morse

A special purpose buoy shall be _______________.

In both regions of the IALA buoyage system, which topmark shown in illustration D022NG below is used on a special mark?...

Under the U.S. Aids to Navigation System, a special mark possesses which of the following characteristics?

Which light characteristic may be used on a special purpose mark?

Which of the buoys listed below could be used to mark an anchorage?

The Light List shows that a navigational light has a nominal range of 15 miles and a height above water of 29 feet (8.8 ...

A special daymark is a _______________.

A survey (special purpose mark) buoy _______________.

The dumping of refuse in a lock is permitted _______________.

You have been informed that dredging operations may be underway in your vicinity. Which buoy indicates the dredging area...

Buoys which mark dredging areas are painted _______________.

Spoil grounds, anchorage areas, cable areas, and military exercise areas are all marked by yellow buoys. Which special m...

Yellow lights may appear on _______________.

Under the IALA Buoyage Systems, a yellow buoy may mark _______________.

Under the U.S. Aids to Navigation System used on the Western Rivers, aids to navigation lights on the right descending ...

What daymark has NO lateral significance?

Under the U.S. Aids to Navigation System on the Western Rivers, the buoys marking the starboard side of the channel whe...

On entering from seaward, a starboard side daymark will _______________.

The Light List indicates that a dayboard is a type MR. You should _______________.

A triangular daymark would be colored _______________.

Entering from seaward, triangular-shaped daymarks are used to mark _______________.

A safe water daymark has what shape?

The Light List indicates that a dayboard is a type KGW. You should _______________.

Port side daymarks may be _______________.

The Light List indicates that a dayboard is a type TR-SY. You should _______________.

What are the colors of a mid-channel daymark?

What daymark shape is used in the lateral system?

When approaching a lock and at a distance of not more than a mile, vessels desiring a single lockage shall sound which s...

You are in a channel inbound from sea. A daymark used to mark a channel junction, when the preferred channel is to port ...

In illustration D045NG below, a green-and-red banded daymark, with the uppermost band green, will have which of the foll...

In illustration D045NG below, what two shapes shown are used to indicate a preferred channel?

What is the approximate geographic range of Fenwick Island Light, Delaware, if your height of eye is 42 feet (12.8 meter...

In illustration D045NG below, which shape is a daymark warning of danger?

A daymark used to indicate the safe water in a channel will have which of the shapes shown in illustration D045NG below?...

Under the U.S. Aids to Navigation System on the Western Rivers, a daymark on the right descending bank will ___________...

Under the U.S. Aids to Navigation System on the Western Rivers, passing daymarks on the right descending bank are ____...

While proceeding downriver (descending) you sight a red diamond-shaped panel with small, red reflector squares in each c...

Under the U.S. Aids to Navigation System on the Western Rivers, passing daymarks on the left descending bank are _____...

What indicates a dual purpose buoy?

You are approaching a multiple-span bridge at night. The main navigational channel span will be indicated by __________...

You are entering an east coast port and see a buoy with a yellow triangle painted on it. What does the symbol indicate? ...

An alternating light _______________.

Clearance gauges at bridges indicate _______________.

Buoys and day beacons exhibiting a yellow triangle or square painted on them are used _______________.

When a dual purpose marking is used, the mariner following the Intracoastal Waterway should be guided by the __________...

You are sailing south on the Intracoastal Waterway (ICW) when you sight a red nun buoy with a yellow square painted on i...

You are approaching a drawbridge and have sounded the proper whistle signal requesting it to open. You hear a signal of ...

You are sailing south on the Intracoastal Waterway (ICW) when you sight a red nun buoy with a yellow square painted on i...

Aids to navigation marking the intra-coastal waterway can be identified by _______________.

The lock chamber is 600 feet X 110 feet. Your towboat is 150 feet X 35 feet. Which of these tows will require a double l...

You are approaching a swing bridge at night. You will know that the bridge is open for river traffic when ______________...

Illustration D036NG below represents a fixed C of E lock and dam. What navigational light(s) is(are) exhibited at the po...

Illustration D037NG below represents a movable dam. If there is high water and the wickets are down so that there is an ...

What lights would you see on the Illinois water way when any wickets of the dam or bear traps are open, or partially ope...

The white lights in a vertical line on a multiple-span bridge indicate _______________.

You are approaching a vertical lift bridge. You know the span is fully open when _______________.

If the main channel under a bridge is marked with lights of the lateral system the adjacent bridge piers should be mark...

The channel under a bridge is marked with lights of the lateral system. The centerline of the channel shall be marked o...

A bridge over a navigable waterway is being repaired. There is a traveler platform under the bridge's deck that signific...

You are upbound approaching a lock and dam and see two green lights in a vertical line. This indicates _______________.

You are downbound approaching a lock and see 3 green lights in a vertical line. This indicates _______________.

Restricted areas at locks and dams are indicated by _______________.

Permission to enter the riverward chamber of twin locks is given by the lockmaster and consists of which sound signal? ...

You are approaching Gallipolis Lock and Dam. The traffic signal light is flashing red. You should _______________.

A flashing red light displayed at a single lock means that the lock _______________.

You are approaching a lock and see a flashing amber light located on the lock wall. You should _______________.

Which light signal indicates that you may approach the lock?

Which light signal indicates that you have permission to enter a lock on the Ohio River?

When approaching a lock entrance, the visual signal displayed when a single lock is ready for entrance is a flashing __...

A flashing green light displayed at a single lock means that the lock is _______________.

If your vessel must pass through a draw during a scheduled closure period, what signal should you sound to request the o...

You are approaching an open drawbridge and sound the proper signal. You receive no acknowledgment from the bridge. Which...

A drawbridge may use visual signals to acknowledge a vessel's request to open the draw. Which signal indicates that the ...

If a towboat requires a double lockage it shall give which sound signal at a distance of not more than one mile from the...

You are holding position above Gallipolis Lock and Dam when you hear two long blasts of the horn from the lock. This in...

What is characteristic of an occulting light?

A light that has a light period shorter than its dark period is described as _______________.

What is the characteristic of a quick light?

You are underway and pass by a lighthouse. Its light, which was white since you first sighted it, changes to red. This ...

When trying to sight a lighthouse you notice a glare from a town in the background. The range at which the light may be...

Which factor(s) is/are used to develop the charted information of a lighthouse?

Which item in illustration D034NG below shows a fixed and flashing light?

Which item in illustration D034NG below shows a flashing light?

The maximum distance at which a light may be seen under existing visibility conditions is called _______________.

The Light List shows that a navigational light has a nominal range of 12 miles and a height above water of 25 feet (7.6 ...

The Light List indicates that a light has a nominal range of 14 miles and is 42 feet (12.7 m) high. If the visibility is...

The Light List indicates that a light has a nominal range of 20 miles and is 52 feet high. If the visibility is 12.0 mil...

The Light List shows that a navigational light has a nominal range of 6 miles and a height above water of 18 feet (5.5 m...

The Light List indicates that a light has a nominal range of 14 miles and is 26 feet high. If the visibility is 14 miles...

The Light List indicates that a light has a nominal range of 14 miles and is 26 feet high. If the visibility is 4 miles ...

The Light List indicates that a light has a nominal range of 18 miles and is 38 feet high. If the visibility is 6 miles ...

The Light List indicates that a light has a nominal range of 8 miles and is 48 feet(14.6 meters) high. If the visibility...

Your height of eye is 40 feet (12.2 meters). What is the approximate geographical distance at which Ambrose Light, NY, c...

What is the approximate geographic range of Race Rock Light, NY, if your height of eye is 27 feet (8.2 meters)? Refer to...

What is the approximate geographic range of Point Judith Light, Rhode Island, if your height of eye is 62 feet (18.9 met...

What is the approximate geographic range of Shinnecock Light, NY, if your height of eye is 24 feet (7.3 meters)? Refer t...

Which conic projection chart features straight lines which closely approximate a great circle?

In very high latitudes, the most practical chart projection is the _______________.

Which statement about a gnomonic chart is correct?

On a gnomonic chart, a great circle track between Los Angeles and Brisbane will appear as a _______________.

When navigating in high latitudes and using a chart based on a Lambert conformal projection, _______________.

The only cylindrical chart projection widely used for navigation is the _______________.

A Mercator chart is a _______________.

Between the equator and the 46th parallel of latitude, there are 3099 meridional parts. How many degrees of equatorial ...

You wish to measure the distance on a Mercator chart between a point in latitude 43°30'N and a point in latitude 40°30'...

Which statement is TRUE concerning a Mercator projection?

To measure distance on a Mercator chart between the parallels of LAT 34°30'N and LAT 31°30'N, which 30 mile scale shoul...

What area of the earth cannot be shown on a standard Mercator chart?

Which nautical charts are intended for coastwise navigation outside of outlying reefs and shoals?

A chart with a scale of 1:45,000 is a _______________.

A chart with a natural scale of 1:160,000 is classified as a _______________.

A chart with a scale of 1:80,000 would fall into the category of a _______________.

A sailing chart could have a scale of _______________.

NGA (NIMA) charts are adopting the metric system. In order to change a charted depth in meters to feet you may use the ...

On an isomagnetic chart, the line of zero variation is the _______________.

Lines on a chart which connect points of equal magnetic variation are called _______________.

The agonic line on an isomagnetic chart indicates the _______________.

How is variation indicated on a small-scale nautical chart?

A revised print of a chart is made _______________.

A chart has extensive corrections to be made to it. When these are made and the chart is again printed, the chart issue...

What information is found in the chart title?

The survey information upon which a chart is based is found _______________.

The value of sixty nautical miles per degree of geodetic latitude is most correct at _______________.

The compass rose on a nautical chart indicates both variation and _______________.

At McAlpine L & D, normal upper pool elevation is 420.0 feet (130.8 meters) MSL, equal to 12.0 feet (3.7 meters) on the ...

Who should be consulted for changing conditions of controlling depths in major channels?

Information about major breakdowns, repairs, or other emergency operations with regard to weirs and (or) wicket dams, on...

Navigation charts of the Upper Mississippi River are published by _______________.

How is a navigation light identified on an Army Corps of Engineers navigation map?

On the Corps of Engineer's Navigation Maps, the channel is _______________.

On an Army Corps of Engineers navigation map, each mile A.H.P. on the Lower Mississippi River is marked by a __________...

What is NOT found in the Mississippi River System Light List?

The Light List shows a lighted aid to navigation on the right bank. This means that the light can be seen on the port s...

The Light List shows a lighted aid to navigation on the right bank. This means that the light can be seen on the starbo...

All aids to navigation listed in the Mississippi River System Light List are shown as miles from a reference point and...

The datum used for soundings on charts of the East Coast of the United States is _______________.

When utilizing a Pacific Coast chart, the reference plane of soundings is _______________.

Mean lower low water is the reference plane used for _______________.

Mean high water is the reference datum used to measure _______________.

Mean high water is used _______________.

The description "Racon" beside an illustration on a chart would mean a _______________.

Chart legends printed in capital letters show that the associated landmark is _______________.

A large automated navigational buoy, such as those that have replaced some lightships, would be shown on a chart by whic...

Chart legends which indicate a conspicuous landmark are printed in _______________.

What does the symbol shown in illustration D033NG below indicate on a chart?

On charts of U.S. waters, a magenta marking is NOT used for marking a _______________.

The buoy symbol printed on your chart is leaning to the northeast. This indicates _______________.

The depth of water on a chart is indicated as 23 meters. This is equal to _______________.

Sometimes foreign charts are reproduced by NGA. On such a chart a wire dragged (swept) area may be shown in purple or _...

The depth of the water is indicated on a chart as 32 meters. This is equal to _______________.

Which symbol represents a 20-fathom curve?

Which symbol represents a 10-fathom curve?

The visible range marked on charts for lights is the _______________.

Your chart indicates that there is an isolated rock and names the rock using vertical letters. This indicates the _____...

When slanted letters are used to spell the name of a charted object you know the _______________.

If you are sailing from the East Coast of the United States to the Caribbean Sea, which publication would contain inform...

Which would you consult for information about the general current circulation in the North Atlantic Ocean?

All of the following can be found on a Pilot Chart EXCEPT information concerning the _______________.

The numeral in the center of a wind rose circle on a pilot chart indicates the _______________.

Which table is NOT found in the U.S. Coast Pilots?

What agency of the U.S. Government issues charts of U.S. waters and Coast Pilots?

You are planning to enter an unfamiliar U.S. port. Which publication provides information about channel depths, dangers,...

Which publication should you check for complete information on Puget Sound weather conditions?

Which publication contains information on navigation regulations, landmarks, channels, anchorages, tides, currents, and ...

It is unlawful to approach within how many yards of a northern right whale?

Vessels should maintain a sharp lookout, especially during December through March, when navigating the right whale's on...

What publication has information on the climate, distances, navigation regulations, outstanding landmarks, channels and ...

You are required to enter a lock on your voyage. Information on the lock regulations, signals, and radio communications...

Northern right whales can be identified by _______________.

What is published by the U.S. Coast Guard?

What is TRUE concerning new editions of Light Lists?

Which of the Nautical Texts is/are published by the U.S. Coast Guard?

How is the intensity of a light expressed in the Light Lists?

To find the specific phase characteristic of a lighthouse on a sound of the United States you would use the ___________...

Which publication lists Class I and II private aids to navigation in or along navigable waters of the United States? ...

Which describes privately maintained aids to navigation included in the Light List?

Civil twilight occurs at 0558 zone time on 30 December. Your DR position at that time is LAT 15°02'N, LONG 46°02'W. Whic...

Civil twilight begins at 1910 zone time on 20 July. Your DR position at that time is LAT 22°16'N, LONG 150°06'W. Which ...

In the Nautical Almanac provided, when would Jupiter and Saturn be visible in temperate latitudes for both evening and m...

Civil twilight starts at 1812 zone time on 26 August, Your DR position at that time is LAT 21°06'S, LONG 14°56' W. Which...

The values of the Greenwich hour angle and declination, tabulated in all almanacs, are for the _ _. ...

What is the major limitation in using the Sight Reduction Tables for Air Navigation Volume I (Pub. No. 249

The principal advantage of NAVTEX radio warnings is that _______________.

Your ship received a HYDROLANT advising of a special warning to mariners from the Department of State for ships in the P...

The Coast Guard broadcasts urgent marine storm warning messages on which of the following frequencies?

Which statement about radio navigational warnings is TRUE?

A major advantage of the NAVTEX system when compared to other systems is that _______________.

What U.S. agency is responsible for NAVAREA warnings?

A NAVAREA warning carries the following number; 1986/87 (11

In the United States, short-range radio navigational warnings are broadcast by the _______________.

In addition to the National Weather Service, what agency provides plain-language radio weather advisories for the coasta...

Which information is NOT provided in broadcasts by the National Institute of Standards and Technology?

The Daily Memorandum contains information on _______________.

Which publication indicates the HYDROLANTS or HYDROPACS issued since the previous working day?

The Local Notice to Mariners is usually published _______________.

Mariners are FIRST warned of serious defects or important changes to aids to navigation by means of _______________.

Which is a weekly publication advising mariners of important matters affecting navigational safety?

You are informed of defects or changes in aids to navigation by _______________.

Charts should be corrected by using information published in the _______________.

What is the most important source of information to be used in correcting charts and keeping them up to date?

On a transpacific voyage, you receive a message from your vessel's operators saying that your vessel has been consigned ...

Which Naval Control of Shipping publication should be aboard your vessel?

Which Naval Control of Shipping publication should be aboard your vessel?

Naval Control of Shipping (NCS) publications should be _______________.

After inventorying the Naval Control of Shipping publications you find there is no copy of ATP-2, Volume II "Allied Cont...

Naval authorities would NOT give orders about which of the following, when the vessel is under control of the Naval Cont...

When a merchant vessel is under the Naval Control of Shipping Organization in wartime, naval authorities may give order...

Which statement about Naval Control of Shipping in wartime is TRUE?

Which publication is NOT carried on board U.S. merchant vessels operating under Naval Control of Shipping?

Your vessel's operators send a message that your vessel has been consigned to Naval Control of Shipping. The message wi...

On a transpacific voyage, you receive a message from your vessel's operators saying that your vessel has been consigned ...

In a national emergency, when communicating via the Navy, messages are sent by precedence. A message designated ROUTIN...

You are proceeding under NCS (Naval Control of Shipping) and wish to send a message warning of a hurricane. Which preced...

You are proceeding under NCS (Naval Control of Shipping) and wish to send a message concerning an initial enemy contact....

You are proceeding under NCS (Naval Control of Shipping) when you wish to send a message concerning your ships diversion...

In a national emergency, when communicating via the Navy, messages are sent by precedence. A message designated IMMEDI...

You are proceeding under NCS (Naval Control of Shipping) and wish to send a message by rapid transmission which does not...

In a national emergency, when communicating via the Navy, messages are sent by precedence. A message designated PRIORI...

In a national emergency, when communicating via the Navy, messages are sent by precedence. A message designated FLASH w...

In a national emergency, when communicating via the Navy, messages are sent by precedence. A message designated IMMEDI...

You are proceeding under NCS (Naval Control of Shipping) and wish to send a message concerning an initial enemy contact....

You are proceeding under NCS (Naval Control of Shipping) when you wish to send a message concerning your ships diversion...

Allied Naval Control of Shipping (NCS) has been established. Which statement is TRUE?

Under Naval Control of Shipping who is responsible for routing and diverting ships and convoys?

Your ship is in a neutral port when full Naval Control of Shipping is established. You may expect to be boarded and ins...

In time of war Naval Control of Shipping Authorities may give orders concerning the _______________.

Defense plans may cause the operation of electronic aids to navigation to be suspended with _______________.

Under defense plans, operation of electronic aids may be temporarily suspended with _______________.

At the establishment of Naval Control of Shipping (NCS), ships at sea will _______________.

Which form of navigation may be suspended without notice under defense planning?

General information on enroute weather and climate is found in _______________.

You are preparing to take a tow from San Diego to Portland, OR. Good seamanship would require that you have on board, av...

Which publication would NOT be used on a voyage from Houston to New York?

The Sailing Directions (Enroute) contain information on _______________.

The Sailing Directions (Enroute) contain information on all of the following EXCEPT _______________.

The Sailing Directions (Planning Guide) contain information on all of the following EXCEPT _______________.

The Sailing Directions are published in the Enroute format and the _______________.

You are planning a voyage from New York to Norway via the English Channel. Which publication contains information on the...

You are planning a voyage from San Francisco to Japan. Which publication contains information on the ocean routes?

Information on search and rescue procedures and special, local communications used in Mexican waters will be found in t...

The Sailing Directions contain information on _______________.

Which publication requires infrequent corrections?

What publication contains information about the port facilities in Cadiz, Spain?

General information about the location, characteristics, facilities, and services for U.S. and foreign ports may be obta...

Eight points of a compass are equal to how many degrees?

How many degrees are there on a compass card?

One point of a compass is equal to how many degrees?

What is the compass course of a vessel heading NW?

What is the compass course of a vessel heading SSW?

What is the compass course of a vessel heading SW?

What is the compass course of a vessel heading WSW?

What is the compass course of a vessel heading WNW?

What is the compass course of a vessel heading SSE?

What is the compass course of a vessel heading SE?

What is the compass course of a vessel heading ESE?

What is the compass course of a vessel heading NE?

What is the compass course of a vessel heading NNE?

Which of the following is a compass card without north-seeking capability that is used for relative bearings?

The heading of a vessel is indicated by what part of the compass?

A vessel heading NNW is on a course of _______________.

A vessel heading NW is on a course of _______________.

A vessel heading NE is on a course of _______________.

A vessel heading ESE is on a course of _______________.

A vessel heading NNE is on a course of _______________.

A vessel heading SW is on a course of _______________.

A vessel heading SE is on a course of _______________.

A vessel heading ENE is on a course of _______________.

Quadrantal error in a gyrocompass has its GREATEST effect on which of the following?

What is the gyrocompass error resulting from your vessel's movement in OTHER than an east-west direction?

Which statement about gyrocompass error is TRUE?

Which of the following is the most accurate method of determining gyrocompass error while underway?

How can the accuracy of an azimuth circle be checked?

What is the reaction of a gyrocompass to an applied force known as?

The spin axis of a gyroscope tends to remain fixed in space in the direction in which it is started. How does this gyros...

Which of the following describes the directive force of a gyrocompass?

What is a system of reservoirs and connecting tubes in a gyro compass called?

By what means are indications of the master gyrocompass sent to remote repeaters?

Which of the following describes gyrocompass repeaters which reproduce the indications of the master gyrocompass? ...

Which of the following may introduce error into a magnetic compass?

What are the only magnetic compass correctors that correct for both permanent and induced effects of magnetism?

Which of the following should be done when crossing the magnetic equator?

What are the quadrantal spheres used for?

What do the soft iron spheres mounted on arms on the binnacle compensate for?

Variation is the angular measurement between what two points?

Which of the following compensates for errors introduced when a vessel heels over?

Which of the following describes the difference between true heading and magnetic heading?

The vertical component of the Earth's magnetic field causes induced magnetism in vertical soft iron. This changes with l...

Heeling error is defined as the change of deviation for a heel of _______________.

To find a magnetic compass course from a true course you must apply _______________.

What does the Flinders bar on a magnetic compass compensates for?

Which statement about the Flinders bar of the magnetic compass is CORRECT?

What does a single vertical magnet placed underneath the compass in the binnacle compensate for?

Which of the following describes the principal purpose of magnetic compass adjustment?

When adjusting a magnetic compass for error, a deviation table should be made _______________.

Deviation which is maximum on intercardinal compass headings may be removed by the _______________.

Before a magnetic compass is adjusted certain correctors must be checked to ensure that they are free of permanent magn...

The Flinders bar and the quadrantal spheres should be tested for permanent magnetism at what interval?

The total magnetic effects which cause deviation of a vessel's compass can be broken down into a series of components w...

Magnetic compass deviation _______________.

If a ship is proceeding towards the magnetic equator, the uncorrected deviation due to permanent magnetism ____________...

If the compass heading and the magnetic heading are the same then _______________.

If the magnetic heading is greater than the compass heading, what direction is the deviation?

What is the difference between magnetic heading and compass heading called?

Deviation is the angle between the _______________.

The horizontal angle between the magnetic meridian and the north-south line of the magnetic compass is _______________.

The compass deviation changes as the vessel changes _______________.

Deviation is caused by _______________.

Compass deviation is caused by _______________.

Deviation in a compass is caused by the _______________.

Variation in a compass is caused by _______________.

Magnetic variation changes with a change in _______________.

Variation is not constant; it is different with every change in _______________.

If a magnetic compass is not affected by any magnetic field other than the Earth's, which statement is TRUE?

The compass error of a magnetic compass that has no deviation is _______________.

The standard magnetic compass heading differs from the true heading by _______________.

Compass error is equal to the _______________.

When changing from a compass course to a true course you should apply _______________.

The chart indicates the variation was 3°45'W in 1988, and the annual change is decreasing 6'. If you use the chart in 19...

The chart indicates the variation was 3°45'W in 1988, and the annual change is increasing 6'. If you use the chart in 19...

The chart indicates the variation was 3°45'E in 1988, and the annual change is increasing 6'. If you use the chart in 19...

Variation is a compass error that you _______________.

Error may be introduced into a magnetic compass by _______________.

The lubber's line on a magnetic compass indicates _______________.

The MOST important feature of the material used for making the binnacle of a standard magnetic compass is that it is __...

Which would influence a magnetic compass?

As a vessel changes course to starboard, the compass card in a magnetic compass _______________.

The permanent magnetism of a vessel may change in strength due to _______________.

Which would influence a magnetic compass?

The lubber's line on a magnetic compass indicates _______________.

The permanent magnetism of a vessel may change in strength due to _______________.

The permanent magnetism of a vessel may change in polarity due to _______________.

Magnets are placed in horizontal trays in the compass binnacle to compensate for the _______________.

Magnets in the binnacles of magnetic compasses are used to reduce the effect of _______________.

Permanent magnetism is caused by _______________.

At the magnetic equator there is no induced magnetism in the vertical soft iron because _______________.

The greatest directive force is exerted on the magnetic compass when the _______________.

The magnetic compass magnets are acted on by the horizontal component of the Earth's total magnetic force. This magneti...

Magnetism which is present only when the material is under the influence of an external field is called _______________...

Induced magnetism is found in _______________.

The line which connects the points of zero magnetic dip is _______________.

The line connecting the points of the earth's surface where there is no dip is the _______________.

The points on the earth's surface where the magnetic dip is 90° are _______________.

The vertical angle between the horizontal and the magnetic line of force is the _______________.

Magnetic dip is a measurement of the angle between the _______________.

By convention, the Earth's north magnetic pole is colored _______________.

By convention, the south pole of a magnet is painted _______________.

By convention, the north pole of a magnet is painted _______________.

By convention, the Earth's south magnetic pole is colored _______________.

By convention, the south seeking ends of a compass' magnets are colored _______________.

By convention, the north seeking ends of a compass' magnets are colored _______________.

What is an advantage of the magnetic compass aboard vessels?

When a magnetic compass is not in use for a prolonged period of time it should _______________.

A magnetic compass card is marked in how many degrees?

When a magnetic compass is not in use for a prolonged period of time it should _______________.

A magnetic compass card is marked in how many degrees?

Your radar has a beam width of 2°. The radar gyro bearing of the right tangent of an island is 316°. The gyro error is 1...

While navigating in fog off a coastline of steep cliffs, you hear the echo of the ships fog horn 2 seconds after the sig...

The dew point is reached when the _______________.

While underway vessels equipped with an automatic identification system (AIS) are required to transmit specific informat...

You are underway on course 050°T and your maximum speed is 12 knots. The eye of a hurricane bears 080°T, 100 miles from ...

The edge of a hurricane has overtaken your vessel in the Gulf of Mexico, and the northwest wind of a few hours ago has s...

Which kind of conditions would you observe as the eye of a storm passes over your vessel's position?

Fog is formed when _______________.

Using the surface analysis in illustration D049NG below, what weather conditions would you expect to find at position A?...

In a microbarograph, the pen should be checked and the inkwell filled _______________.

The correction(s) which must be applied to an aneroid barometer reading include(s) _______________.

Tropical storms and hurricanes are most likely to form in the Southern hemisphere during _______________.

Steady precipitation is typical of _______________.

In illustration D009NG below, your position X is at LAT 35°S. Which winds are you experiencing?

A hand held instrument used to measure distances between objects and the ship is a _______________.

The presence of stratus clouds and a dying wind will usually result in _______________.

The winds of the "roaring forties" are strongest near _______________.

What does not contribute to the commercial GPS receiver position error?

What happens to the barometric pressure after a cold front passes?

Your Electronic Plotting Aid (EPA) has automatic speed inputs from the log. Due to currents, the log is indicating a fas...

An instrument that indicates wind direction is known as a(n) _______________.

The usual sequence of directions in which a tropical cyclone moves in the Southern Hemisphere is _______________.

You are enroute to assist vessel A. Vessel A is underway at 6 knots on course 133°T, and bears 042° at 105 miles from y...

You are steaming in the open ocean of the North Pacific between the Aleutian Chain and Hawaii. A warning broadcast indic...

You are underway on course 050°T and your maximum speed is 12 knots. The eye of a hurricane bears 120°T, 110 miles from ...

ECDIS must give an alarm for which of the following cases?

A sling psychrometer is used to measure _______________.

In a tropical cyclone in the Northern Hemisphere, a vessel hove to with the wind shifting counterclockwise would be ___...

The area of strong westerly winds occurring between 40°S and 60°S latitude is called the _______________.

While navigating in fog off a coastline of steep cliffs, you hear the echo of the ship's fog horn 4 1/2 seconds after th...

A mercurial barometer at sea is subject to rapid variations in height ("pumping") due to the pitch and roll of the vesse...

A katabatic wind blows _______________.

If you are caught in the left semicircle of a tropical storm, in the Southern Hemisphere, you should bring the wind ___...

If your weather bulletin shows the center of a low pressure area to be 100 miles due east of your position, what winds c...

Coral atolls, or a chain of islands at right angles to the radar beam, may show as a long line rather than as individua...

Your vessel is on course 150°T, speed 17 knots. The apparent wind is from 40° off the starboard bow, speed 15 knots. Wh...

A weather forecast states that the wind will commence backing. In the Northern Hemisphere, this would indicate that it ...

Time signals broadcast by WWV and WWVH are transmitted _______________.

Your vessel is participating in the Voluntary Observing Ship Program. You are preparing WS Form B-80 as seen in illustra...

From which type of cloud can a tornado or waterspout develop?

The wind speed and direction observed from a moving vessel is known as _______________.

You are radar scanning for a buoy fitted with a racon. In illustration D017NG below, which radar screen represents the p...

When using an ARPA, what should you consider in order to evaluate the information displayed?

How many characters does the short text messaging feature of the automatic identification system (AIS) allows for?

Your vessel is participating in the Voluntary Observing Ship Program, you are preparing WS Form B-80 as seen in illustra...

Yesterday you took a time tick using the 1200 GMT broadcast, and the chronometer read 11h 59m 59s. Today at the 1200 GMT...

In most cases, the direction of the apparent wind lies between the bow and _______________.

Which theoretical minimum number of measurements from satellites does a GPS receiver need in order to provide an exact ...

Which statement describes the prevailing wind direction in mid-winter in the Gulf Coast area?

Which type of cloud is the classic "thunderhead"?

Weather information provided by the National Weather Service (NWS) advisories should be used along with _______________...

You should log all barometer readings taken at sea _______________.

You are underway on course 050°T and your maximum speed is 13 knots. The eye of a hurricane bears 120°T, 100 miles from ...

Yesterday your chronometer read 03h 01m 56s at the 1500 GMT time tick. Today your chronometer read 03h 01m 54s at the 15...

Which type of front forms when a cold front overtakes and forces a warm front upwards?

Your vessel is on course 270°T, speed 10 knots. The apparent wind is from 10° off the port bow, speed 30 knots. From wh...

Which of the four adjustable errors in the sextant causes side error?

A source of an air mass labeled mTw is _______________.

Yesterday your chronometer read 11h 59m 59s at the 1200 GMT time tick. Today the chronometer reads 11h 59m 57s at the 12...

Yesterday your chronometer read 11h 59m 58s at the 1200 GMT time tick. Today your chronometer reads 12h 00m 00s at the 1...

Brief, violent showers frequently accompanied by thunder and lightning are usually associated with _______________.

How is an occluded front represented on a weather map?

When using the ARPA in heavy rain, which action should you take?

Which ARPA data should you use in order to determine if a close quarters situation will develop with a target vessel? ...

You can expect frontal activity when two air masses collide and _______________.

Which cloud commonly produces a halo about the Sun or Moon?

When cold air displaces warm air you have a(n) _______________.

While navigating in fog off a coastline of steep cliffs, you hear the echo of the ship's fog horn 4 seconds after the si...

The wind velocity is higher in the dangerous semicircle of a tropical cyclone because of the _______________.

Your present weather is sunny with a steady barometer. A low swell approaches your vessel from the south with crests pas...

What option does an Electronic Plotting Aid (EPA) not have?

The hurricane season in the North Atlantic Ocean reaches its peak during the month of _______________.

Cumulonimbus clouds can produce _______________.

The ARPA may swap targets when automatically tracking if two targets _______________.

In the Northern Hemisphere, what type of cloud formations would you expect to see to the west of an approaching tropical...

Yesterday your chronometer read 03h 01m 56s at the 1500 GMT time tick. Today your chronometer read 03h 01m 58s at the 15...

Yesterday your chronometer read 02h 59m 58s at the 1500 GMT time tick. Today the chronometer reads 03h 00m 02s at the 15...

When operated over a muddy bottom, a fathometer may indicate _______________.

Chronometer error may be found by _______________.

The doldrums are characterized by _______________.

Tropical cyclones do not form within 5° of the Equator because _______________.

The eye of a hurricane is surrounded by dense black cumulonimbus clouds which are called the _______________.

The direction of prevailing winds in the Northern hemisphere is caused by the _______________.

While on watch, you notice that the air temperature is dropping and is approaching the dew point. Which type of weather ...

A marine chronometer should be rewound once every _______________.

Which weather change accompanies the passage of a cold front in the Northern Hemisphere?

A radar display which is oriented, so that north is always at the top of the screen, is called a(n) _______________.

When using a mechanical (windup type) marine chronometer, how often should it be reset?

Yesterday your chronometer read 11h 59m 59s at 1200 GMT time tick. Today the chronometer reads 12h 00m 01s at the 1200 G...

Swells that have outrun the storm are produced in the _______________.

What will a veering wind do?

When the index and horizon mirrors of a properly adjusted sextant are at an angle of 45° to each other, the arc reads _...

The passing of a low pressure system can be determined by periodically checking the _______________.

Your facsimile prognostic chart indicates that you will cross the cold front of a low pressure system in about 24 hours...

Which type of cloud is composed entirely of ice crystals and is found at very high altitudes?

In the Northern Hemisphere, a wind that shifts counterclockwise is a _______________.

Which of the four adjustable errors in the sextant is the principle cause of index error?

A series of brief showers accompanied by strong, shifting winds may occur along or some distance ahead of a(n) ________...

Which of the following are data layer categories to be displayed on ECDIS?

What kind of pressure systems travel in tropical waves?

The Beaufort scale is used to estimate the _______________.

On mid-ocean waters, the height of a wind-generated wave is not affected by the _______________.

An instrument that maintains a continuous record of humidity changes is called a _______________.

You are enroute to assist vessel A. Vessel A is underway at 6 knots on course 133°T, and bears 042°T, 105 miles from yo...

The instrument most commonly used to gather the data for determining the relative humidity is the _______________.

On the pole side of the trade wind belt, there is an area of high pressure with weak pressure gradients and light, vari...

Because of the reflecting properties of a sextant, if the sextant altitude reads 60° on the limb, the actual arc of the...

The height of a wave is the vertical distance _______________.

A ship is on course 195° at a speed of 15 knots. The apparent wind is from 40° on the port bow, speed 30 knots. The dir...

The navigable semicircle of a typhoon in the Southern Hemisphere is the area _______________.

Tropical cyclones normally form within which of the following belts of latitude?

In what order should the following sextant adjustments be made? I. Make telescope parallel to frame of sextant. II...

Which is a nonadjustable error of the sextant?

A sea breeze is a wind _______________.

Cumulonimbus clouds are formed by _______________.

When a tornado moves over the water from land it is called a _______________.

ECDIS must be able to perform all of the following EXCEPT _______________.

The part of a sextant mounted directly over the pivot of the index arm is the _______________.

When using an Electronic Plotting Aid (EPA), what should you consider in order to evaluate the information displayed? ...

If you count 20 seconds between seeing lightning and hearing the thunder, how far is the storm away from you?

What is a nonadjustable error of the sextant?

Ascending and descending air masses with different temperatures is part of an important heat transmitting process in ou...

Cyclones tend to move _______________.

Which of these sextant errors is nonadjustable?

What causes the error of collimation with regards to the four adjustments to a sextant?

The horizon glass of a sextant is _______________.

There are seven sources of error in the marine sextant. Of the four errors listed, which one is adjustable?

For a well made and well maintained sextant, the maximum value of which correction is usually so small that it can be ig...

Most GPS receivers use the Doppler shift of the carrier phase to compute _______________.

A sextant having an index error that is "on the arc" has a _______________.

A Doppler log in the volume reverberation mode indicates _______________.

Isobars on a weather map are useful in predicting _______________.

A sextant having an index error that is "off the arc" has a _______________.

A easterly wave is located 200 miles due west of your position, which is north of the equator. Where will the wave be in...

The marine sextant is subject to seven different types of errors, four of which may be corrected by the navigator. An ...

Index error of a sextant is primarily caused by _______________.

According to Buys Ballot's law, when an observer in the Northern Hemisphere experiences a northeast wind the center of ...

What indicates that a tropical cyclone may be within 500 to 1,000 miles of your position?

The beam width of your radar is 2°. The left tangent bearing of a small island, as observed on the PPI scope, is 056°pgc...

The level of database information which cannot be removed from the ECDIS display and consists of information which is re...

The recording fathometer produces a graphic record of the _______________.

A very light breeze that causes ripples on a small area of still water is a _______________.

What natural feature is responsible for the rather even climate found on the Florida peninsula throughout the year? ...

What will cause the Electronic Plotting Aid (EPA) to emit a visual alarm, audible alarm, or both?

In order to remove index error from a sextant, you should adjust the _______________.

In regions near the poles, the winds are generally described as _______________.

Your vessel is participating in the Voluntary Observing Ship Program, you are preparing WS Form B-80 as seen in illustra...

The force resulting from the earth's rotation that causes winds to deflect to the right in the Northern Hemisphere and t...

The index error is determined by adjusting the _______________.

Fetch is the _.

You are attempting to locate your position relative to a hurricane in the Northern Hemisphere. If the wind direction re...

The winds with the greatest effect on the set, drift, and depth of the equatorial currents are the _______________.

A marine sextant has the index arm set at zero and the reflected image of the horizon forms a continuous line with the a...

You have replaced the chart paper in the course recorder. What is NOT required to ensure that a correct trace is recorde...

Which wind results from a land mass cooling more quickly at night than an adjacent water area?

In order to remove side error from a sextant, you should adjust the _______________.

A tropical storm is a tropical cyclone that generates winds of _______________.

What is the typical operating range of Automatic Identification Systems (AIS) at sea?

The dense black cumulonimbus clouds surrounding the eye of a hurricane are called _______________.

In general, on how many radio channels will an automatic identification system (AIS) operate?

On a clear, warm day, you notice the approach of a tall cumulus cloud. The cloud top has hard well defined edges and rai...

When reporting wind direction, you should give the direction in _______________.

A low HDOP (Horizontal Dilution of Precision) number such as 2 indicates a _______________.

On which of the following does an automatic identification system (AIS) transponder transmit and receive information? ...

While navigating in fog off a coastline of steep cliffs, you hear the echo of the ship's fog horn 3 seconds after the si...

Which two channels does an automatic identification system (AIS) transponder use to transmit and receive information bro...

Which information must automatic identification systems (AIS) automatically provide to appropriately equipped shore stat...

ECDIS units incorporate Digital Chart Data Formats, which include _______________.

A single barometric pressure reading of 28.60 indicates _______________.

According to Buys Ballot's law, when an observer in the Northern Hemisphere experiences a northwest wind, the center of...

Which statement is FALSE concerning the dangerous semicircle of a hurricane?

You are underway on course 120°T and your maximum speed is 12 knots. The eye of a hurricane bears 150°T, 120 miles from ...

Automatic identification systems (AIS) are required to do which of the following?

Which of the following statements is TRUE regarding automatic identification systems (AIS)?

The apparent wind's speed can be zero, but only when two conditions are present. One condition is that the true _______...

If an observer in the Northern Hemisphere faces the surface wind, the center of low pressure is to his _______________...

Your vessel is participating in the Voluntary Observing Ship Program, you are preparing WS Form B-80 as seen in illustra...

Your vessel is participating in the Voluntary Observing Ship Program, at 1800 ZT on 31 October your position is LAT 24°...

When using the Electronic Plotting Aid (EPA) in heavy rain, which action should you take?

Which of the following statements is TRUE regarding automatic identification systems (AIS)?

What instrument measures wind velocity?

When recording the wind direction in the weather log, you would report the _______________.

Prior to reading an aneroid barometer, you should tap the face lightly with your finger to _______________.

Which instrument is used to predict the approach of a low pressure system?

If the electronic chart is part of an ECDIS, it must display the minimum data required by IMO/IHO, to include all of th...

Lines drawn through points on the Earth having the same atmospheric pressure are known as _______________.

A tsunami is caused by a(n) _______________.

Which of the following statements is TRUE regarding automatic identification systems (AIS)?

Which condition indicates that you are in a hurricane's dangerous semicircle in the Northern hemisphere?

The belt of light and variable winds between the westerly wind belt and the northeast trade winds is called the _______...

In modern fathometers the sonic or ultrasonic sound waves are produced electrically by means of a(n) _______________.

When using GPS, how many theoretical position lines are required for a two- dimensional fix?

Which of the following statements is TRUE regarding automatic identification systems (AIS)?

You are underway on course 050°T and your maximum speed is 11 knots. The eye of a hurricane bears 070°T, 80 miles from y...

An Electronic Plotting Aid (EPA) will drop off a target's vector if more than minutes elapse between each manual plot. ...

Illustration D011NG below represents the geographic location of a vessel and the radar presentation at the same time. Wh...

Ocean swells originating from a typhoon can move ahead of it at speeds near _______________.

If a sound signal is emitted from the oscillator of a fathometer, and two seconds elapse before the returning signal is ...

A warm air mass is characterized by _______________.

On what does the operation of an aneroid barometer depend?

What will cause the ARPA to emit a visual alarm, audible alarm, or both?

You have another ship overtaking you close aboard to starboard. You have 3 radar targets bearing 090° relative at ranges...

Your ARPA has been tracking a target and has generated the targets course and speed. The radar did not receive a target ...

Vessels required to have an Automatic Radar Plotting Aid must have a device to indicate the _______________.

The barometer is an instrument for measuring the _______________.

Your ARPA has automatic speed inputs from the log. Due to currents, the log is indicating a faster speed than the speed ...

Your ARPA has two guard zones. What is the purpose of the inner guard zone?

An instrument useful in predicting fog is the _______________.

An indirect radar echo is caused by a reflection of the main lobe of the radar beam off the observer's vessel. Which of ...

Weather conditions in the middle latitudes generally move _______________.

A tropical wave is usually preceded by _______________.

Your vessel is participating in the Voluntary Observing Ship Program, at 1200 ZT on 31 August, your position is LAT 43°...

In a weather report, the term "visibility" expresses _______________.

What is TRUE of the history display of a target's past positions on an ARPA?

Which of the following must the electronic chart of an ECDIS display, as required by IMO/IHO?

Prevailing winds between 30°N and 60°N latitude are from the _______________.

What should you apply to a fathometer reading to determine the depth of water?

Your vessel is participating in the Voluntary Observing Ship Program, you are preparing WS Form B-80 as seen in illustra...

Raster-scan chart data is _______________.

Which of the following data layer categories is NOT displayed on ECDIS?

You are enroute from Puerto Rico to New York. A hurricane makes up and is approaching. If the wind veers steadily, this...

According to Buys Ballot's Law, when an observer in the Southern Hemisphere experiences a northwest wind, the center of...

NOAA VHF weather reports are continuously broadcast on VHF channels WX-1, WX-2 and WX-3 on a frequency of _____________...

In the Northern Hemisphere, the right half of the storm is known as the dangerous semicircle because _______________.

An ECDIS is required to display which information?

Your vessel is participating in the Voluntary Observing Ship Program, you are preparing WS Form B-80 as seen in illustra...

The database resulting from (1

You are enroute to assist vessel A. Vessel A is underway at 5 knots on course 063°T, and bears 136°T at 78 miles from y...

The database information that should be shown when a chart is first displayed on ECDIS is the _______________.

The strongest winds and heaviest rains in a hurricane are found in the _______________.

Chart information details to be used in ECDIS should be the latest edition of information originated by a government-aut...

With regard to GPS, a civilian receiver may be capable of achieving the same accuracy as a military receiver if _______...

A storm's track is characterized by all of the following except _______________.

A steep barometric gradient indicates _______________.

ECDIS must have the capability to preserve the record of the voyage track for the previous _______________.

While in port, you can follow the approach of a dangerous cyclonic storm by inspecting _______________.

Which instrument is used to measure the relative humidity of the air?

Using the surface analysis in illustration D049NG below, what change in the wind direction could be expected at position...

A weather forecast states that the wind will commence veering. In the Northern Hemisphere this indicates that the wind ...

Which data must ECDIS be able to record at one-minute intervals?

An isotherm is _______________.

Severe tropical cyclones (hurricanes, typhoons) occur in all warm-water oceans except the _______________.

In the Northern Hemisphere, the largest waves or swells created by a typhoon or hurricane will be located _____________...

Which of the following must an ECDIS system be able to perform?

While navigating in fog off a coastline of steep cliffs, you hear the echo of the ships fog horn 2 1/2 seconds after the...

The dangerous semicircle of a typhoon in the Southern Hemisphere is that area _______________.

When your vessel is on or near the path of an approaching tropical storm the _______________.

Weather patterns in the Gulf area of the United States are _______________.

The dangerous semicircle of a hurricane in the Northern Hemisphere is that area of the storm _______________.

Vessel required to have an Electronic Plotting Aid (EPA) must have a device to indicate the _______________.

How many targets can an Electronic Plotting Aid (EPA) track at the same time?

Your Electronic Plotting Aid (EPA) has two guard zones. What is the purpose of the inner guard zone?

Electronic Plotting Aid (EPA) has which built in functions?

To avoid error you should read the scale of an aneroid barometer with your eye placed _______________.

Electronic Plotting Aid (EPA) has which built in functions?

The speed of sound through ocean water is nearly always _______________.

An instrument designed to maintain a continuous record of atmospheric pressure is a(n) _______________.

You are enroute to assist vessel A. Vessel A is underway at 5.5 knots on course 033°T, and bears 284°T at 43 miles from...

What is the average speed of the movement of a hurricane following the recurvature of its track?

Which factor has the greatest effect on the amount of gain required to obtain a fathometer reading?

What is the primary source of the earth's weather?

Tropical cyclones are classified by form and intensity. Which system does not have closed isobars?

Air temperature varies with _______________.

You are in the Northern Hemisphere and a tropical wave is located 200 miles due west of your position. Where will the wa...

You are underway on course 050°T and your maximum speed is 12 knots. The eye of a hurricane bears 120°T, 110 miles from ...

The speed of sound in water is approximately _______________.

When using an echo sounder in deep water, it is NOT unusual to _______________.

When using a recording depth finder in the open ocean, what phenomena is most likely to produce a continuous trace that ...

All echo-sounders can measure the _______________.

An electronic depth finder operates on the principle that _______________.

When using GPS without Selective Availability, you may expect your horizontal accuracy to be better than ______________...

When navigating using GPS, what is an indicator of the geometry of the satellites that your receiver is locked onto? ...

What do the numbers on isobars indicate?

Atmospheric pressure may be measured with a(n) _______________.

Using the surface analysis in illustration D049NG below, which wind speeds are reported at position A?

Which feature, when set to zero, might allow a GPS unit to have an accuracy equivalent to Precise Positioning Service re...

The highest level of commercial navigational accuracy is provided by _______________.

The intensity of a hurricane as it reaches higher latitudes and cooler waters _______________.

While navigating in fog off a coastline of steep cliffs, you hear the echo of the ships fog horn 6 seconds after the sig...

Barometers are calibrated at a standard temperature of _______________.

A vessel entering the eye of a hurricane should expect _______________.

Which statement concerning GPS is TRUE?

Which type of GPS receiver has at least four channels to process information from several satellites simultaneously? ...

With respect to failure warnings and status indications, GPS receivers should provide, at a minimum, _______________.

When using the radar for navigating _______________.

Illustration D011NG below represents the geographic location of a vessel and the radar presentation at the same time. Wh...

You are approaching a light fitted with a RACON. The light may be identified on the radar by _______________.

You are approaching a sea buoy which emits a racon signal. This signal is most frequently triggered by which type of rad...

In order to insure that the racon signal is visible on your 3 cm radar, the _______________.

The signal from a ramark will show on the PPI as a _______________.

You are anchored in the Aleutian Island chain and receive word that a tsunami is expected to strike the islands in six h...

You are using a radar in which your own ship is shown at the center, and the heading flash always points to 0°. If beari...

In the Northern Hemisphere you are caught in the dangerous semicircle of a storm with plenty of sea room available. The...

What classification of tropical cyclone would have closed isobars, counter clockwise rotary circulation, and sustained w...

Your radar is set on a true motion display. Which of the following will appear to move across the PPI scope?

Your radar displays your ship off center. As you proceed on your course, your ship's marker moves on the PPI scope while...

The chart of a beach area shows a very flat slope to the underwater beach bottom. What type of breakers can be expected...

A microbarograph is a precision instrument that provides a _______________.

The radar control used to reduce sea return at close ranges is the _______________.