Question 50 OSV01 - Master/Chief Mate - Offshore Supply Vessels

The Correct Answer is B A continuous sounding of a fog whistle (or any prolonged sounding device) by a vessel is internationally recognized and prescribed by the nautical rules of the road (specifically, the International Regulations for Preventing Collisions at Sea, or COLREGs, Rule 37) as an **emergency signal indicating the vessel is in distress and requires assistance.** ### Why other options are incorrect: **A) A request that the draw span of a bridge to be opened:** Bridge opening requests usually involve specific short blasts (e.g., one long followed by one short) or communication via radio, not a continuous sounding of the fog whistle. **C) That the vessel is anchored:** When anchored in restricted visibility (fog), a vessel sounds the rapid ringing of the bell for 5 seconds every minute, possibly followed by the sounding of a gong, but not a continuous blast of the whistle. **D) A vessel is broken down and drifting:** While a vessel broken down may eventually lead to a distress situation, the specific signal for a vessel requiring immediate aid (distress) is the continuous blast. A vessel that is merely drifting but not yet in imminent peril would typically use prescribed restricted visibility signals (if applicable) or radio communication, not the recognized international distress signal.