Question 4Navigation General70% to pass
Under the IALA-A Buoyage System, when entering from seaward, a buoy indicating the preferred channel is to starboard may have which of the following?
AI Explanation
The correct answer is A) square topmark.
Under the IALA-A Buoyage System, a buoy indicating the preferred channel to starboard when entering from seaward will have a square topmark. This is because the preferred channel is to the right (starboard) side, and the square topmark is the standard shape used to mark the preferred channel in this system.
The other options are incorrect because: B) a conical shape is used to mark the preferred channel to port; C) a long-flashing light characteristic is not a specific requirement for this type of buoy; and D) a green light is the color used for a buoy marking the preferred channel, but it does not define the shape of the topmark.
Related Questions
#2 If your vessel were proceeding up river (ascending), the port side of the channel would be marked according to the U. S. Aids to Navigation System on the Western Rivers by _______________.#3 What is the basic principle of the magnetic compass? #5 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 meters). Your height of eye is 52 feet (15.8 meters) and the visibility is 11.0 miles. At which approximate range will you first sight the light? #6 On a Mercator chart, 1 nautical mile is equal to _______________.#7 An occulting light is one in which _______________.