Question 50 ONC05 - Master or Mate of LT 200 GRT

The Correct Answer is B **Explanation for Option B (A vessel is in distress):** The continuous sounding of any fog signal apparatus (whistle, horn, etc.) is the universally recognized international and inland signal indicating that a vessel is in **distress** and requires assistance. This signal is specified in the International Regulations for Preventing Collisions at Sea (COLREGs) Annex IV and generally upheld by Inland Rules (e.g., US Inland Navigation Rules). **Why other options are incorrect:** * **A) A request that the draw span of a bridge to be opened:** Bridge signals are typically defined by local regulations or specific signals (often five short blasts, or specific radio communication), not a continuous fog signal. * **C) That the vessel is anchored:** A vessel at anchor or aground must sound a specific prescribed signal (e.g., rapid ringing of the bell for five seconds, followed by a gong, at intervals of not more than one minute). It does not sound a continuous fog whistle. * **D) A vessel is broken down and drifting:** While a broken-down vessel may eventually use the distress signal if assistance is immediately required, the standard signal for a vessel experiencing mechanical failure or drifting (if not under command) is typically the "not under command" signal (two prolonged blasts followed by two short blasts) or communication via radio, not a continuous blast, unless the situation has progressed to immediate distress.