Question 42Navigation General

The correct answer is D) have an even number. A nun buoy is a type of navigational buoy that is conical in shape and has an even-numbered identification number. This is in accordance with the United States Aids to Navigation System, which specifies that nun buoys must have even-numbered identification numbers to indicate that they should be kept to the starboard (right) side when entering from seaward. The other answer choices are incorrect because: A) a nun buoy is not left to port when entering from seaward, but rather to starboard; B) a nun buoy is conical, not cylindrical; and C) the color of a nun buoy is not necessarily green, as they can also be red or other colors.