Question 906 Rules of the Road

The correct answer is B) One prolonged blast. According to the Inland Navigation Rules and the International Regulations for Preventing Collisions at Sea (COLREGS), a vessel nearing a bend or any other point where other vessels may be obscured by an intervening obstruction is required to sound one prolonged blast to alert other vessels in the vicinity of its presence and position. This signal helps warn other vessels that may not be visible due to the bend or obstruction, allowing them to take appropriate action to avoid a collision. The other options are incorrect because they do not align with the specific signal required in this situation. Two short blasts (A), one short blast (C), and one long blast (D) are signals used for different purposes and do not adequately warn other vessels of the approaching vessel's presence near an obscured area.