Question 321Navigation General70% to pass
What is a lighted safe water mark fitted with to aid in its identification?
AI Explanation
The correct answer is C) A spherical topmark.
A lighted safe water mark is fitted with a spherical topmark to aid in its identification. This is in accordance with the International Association of Lighthouse Authorities (IALA) Maritime Buoyage System, which is the standard used for marking navigable waterways. The spherical shape of the topmark helps distinguish the safe water mark from other types of buoys and beacons.
The other answer choices are incorrect because: A) a red and white octagon is the shape of a regulatory buoy, not a safe water mark; B) red and white retro-reflective material is a general feature of many buoys, not specific to safe water marks; and D) a sequential number is not a physical feature of the buoy itself, but rather a means of identification.
Related Questions
#319 A spherical buoy may be _______________.#320 You are approaching a drawbridge and must pass through during a scheduled closure period. What signal should you sound? #322 In the IALA Maritime Buoyage System, what is a red and white vertically-striped buoy used to indicate? #323 You are approaching the first of two drawbridges that span a narrow channel. The second drawbridge is close to the first. Which signals should you sound? #324 What is the approximate geographic range of Horton Point Light, NY, if your height of eye is 40 feet (12.2 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS".