Question 894 Rules of the Road

The correct answer is A) A prolonged blast. According to the International Regulations for Preventing Collisions at Sea (COLREGS) and the Inland Navigation Rules, when approaching a bend in the river or channel, a vessel must sound a prolonged blast on the whistle to indicate its presence and location to any vessels around the bend. This signal allows other vessels to be aware of your approach and helps prevent collisions. The other answer choices are incorrect because a short blast (B), a one short-one prolonged-one short blast (C), or a long blast (D) are not the appropriate signals for this situation. The COLREGS and Inland Rules specifically call for a prolonged blast when approaching a bend.