Question 209Navigation General70% to pass
Under the U.S. Aids to Navigation System, a lighted buoy with a spherical topmark marks _______________.
AI Explanation
The correct answer is D) safe water.
According to the U.S. Aids to Navigation System, a lighted buoy with a spherical topmark marks safe water, which is the deepest part of the channel or fairway where vessels can safely navigate. The spherical topmark is a distinct visual cue that helps mariners identify this type of buoy.
The other answer choices are incorrect because: A) port-side markers have a different shape (can or nun), B) underwater cables are not typically marked with buoys, and C) hazards to navigation are marked with different topmarks, such as a conical or pillar shape.
Related Questions
#207 You are required to enter a lock on your voyage. Information on the lock regulations, signals, and radio communications can be found in _______________.#208 The reference datum used in determining the heights of land features on most charts is _______________.#210 When determining compass error by an azimuth of Polaris, you enter the Nautical Almanac with the _______________.#211 In illustration D044NG below, a pillar buoy is indicated by which letter? #212 Under the IALA-B Buoyage System, when entering from seaward a lateral system buoy to be left to port may display which of the topmarks shown in illustration D046NG below?