Question 24Navigation General

The correct answer is D) flashing blue lights. The draw span of a floating drawbridge is typically marked with flashing blue lights. This is a regulatory requirement specified in the United States Coast Guard Navigation Rules and Regulations Handbook. The blue lights indicate the location of the draw span and help alert mariners to the presence of the drawbridge. The other answer choices are incorrect because: A) a yellow light showing Morse Code is not a standard marking for a drawbridge, B) there is no such marking, and C) a yellow and white diamond is used to mark the location of fixed bridges, not floating drawbridges.