Question 480 Rules of the Road

The correct answer is B) The vessel is altering course to port. According to the International Regulations for Preventing Collisions at Sea (COLREGS), two short blasts of the whistle signal that the vessel is altering course to port. This alerts nearby vessels that the vessel is changing direction to the left, so they can take appropriate action to avoid a collision. The other options are incorrect because A) indicates the vessel is altering course to starboard (right), C) would mean the vessel is altering course to starboard, and D) would signal the vessel is leaving the other vessel on its port (left) side, which is the opposite of what the two short blasts indicate.