Question 468 Rules of the Road

The correct answer is D) No signal is required. According to the International Regulations for Preventing Collisions at Sea (COLREGS), when two vessels are meeting but will pass clear of each other on their starboard (right) sides, no whistle signal is required. This is because the vessels are taking the appropriate actions to avoid a collision, and a whistle signal is not necessary to communicate their intentions. The other answer choices (A, B, and C) would be incorrect because they describe whistle signals that are used for different situations, such as when vessels are crossing or overtaking each other.