Question 50

The Correct Answer is B **Explanation for Option B (A vessel is in distress):** The continuous sounding of any fog signal apparatus (such as a fog whistle, horn, or bell) by a vessel is internationally recognized under the *International Regulations for Preventing Collisions at Sea* (COLREGs, Rule 37) and domestically under U.S. Inland Rules as a universal distress signal. A vessel uses this prolonged and continuous signal to indicate it is in grave and imminent danger and requires assistance. **Why the other options are incorrect:** * **A) A request that the draw span of a bridge to be opened:** Bridge opening requests are typically communicated using specific short and long blasts (usually one prolonged blast followed by one short blast, or as specified by local regulations) or by radio, not a continuous sounding. * **C) That the vessel is anchored:** The signal for a vessel at anchor during restricted visibility is the rapid ringing of a bell for about five seconds every minute (for vessels 100 meters or more, this is followed by a gong). It is a distinct, intermittent signal, not a continuous sounding. * **D) A vessel is broken down and drifting:** While a broken-down vessel may be in distress, simply being broken down or drifting does not automatically require the continuous fog signal. A power-driven vessel underway but stopped and making no way through the water in fog would sound two prolonged blasts every two minutes. The continuous sounding is reserved specifically for the immediate danger associated with distress.