Question 48 ONC05 - Master or Mate of LT 200 GRT

The Correct Answer is C **Explanation for Option C (Correct Answer):** Option C, "One prolonged and two short blasts at two-minute intervals," is the correct fog signal for a vessel restricted in its ability to maneuver (RAM) or a vessel **at anchor** in a restricted area, under the specific conditions mentioned in the International Regulations for Preventing Collisions at Sea (COLREGs). * **COLREGs Rule 35(c) (Fog Signals):** This rule states that a vessel **not under command**, a **vessel restricted in its ability to maneuver** (RAM), a **vessel constrained by its draught**, a **sailing vessel**, a **vessel engaged in fishing** (whether underway or at anchor/stopped), and a **towing or pushing vessel** shall sound at intervals of not more than two minutes, one prolonged blast followed by two short blasts. * A vessel engaged in fishing, even when at anchor, falls under the category of vessels required to use this specific signal sequence (one prolonged followed by two short blasts). This is defined by COLREGs Rule 35(c). **Explanation of Why Other Options Are Incorrect:** * **A) A rapid ringing of the bell for five seconds at one-minute intervals:** This is the optional supplementary signal that a vessel **at anchor** may sound to warn an approaching vessel of her position and the possibility of collision, *after* the required signal (Rule 35(f) or 35(g)) has been sounded. It is not the *primary* required fog signal for a vessel engaged in fishing. * **B) One prolonged and three short blasts at two-minute intervals:** This signal is specified by COLREGs Rule 35(d) for a **towed vessel** or the last vessel of a tow, if manned. It is not the signal for a vessel engaged in fishing. * **D) A sounding of the bell and gong at one-minute intervals:** COLREGs Rule 35(g) requires a vessel 100 meters or more in length when **at anchor** to sound the bell forward and the gong aft, at intervals of not more than one minute. While the vessel is *at anchor*, because it is specifically "engaged in fishing," the RAM-related signal (Rule 35(c)) takes precedence over the general anchoring signal (Rule 35(g)).