Question 46 TV01 - Towing Vessels - Oceans or Near Coastal

The Correct Answer is D ### Explanation for Option D ("All of the above") The fog signal of **one prolonged blast followed by two short blasts** is the designated signal (under COLREG Rule 35(c) and 35(g)) for various vessels that are unable to navigate freely, regardless of whether they are underway or at anchor. Since all three scenarios listed in options A, B, and C legally require this specific sound signal under the International and Inland Rules, D is the correct comprehensive answer. **Why the individual options are correct (and therefore why D is the only complete answer):** * **A) A vessel restricted in its ability to maneuver, at anchor:** This scenario is covered by Rule 35(g). A vessel restricted in its ability to maneuver (RAM) must, when anchored, sound the standard anchor signal plus the special signal prescribed in Rule 35(c) (one prolonged followed by two short blasts) to indicate its difficulty moving. * **B) A sailing vessel underway:** This scenario is covered by Rule 35(c). A sailing vessel, when making way through the water, is required to sound one prolonged blast followed by two short blasts at intervals of not more than two minutes. * **C) A vessel not under command (NUC):** While not explicitly listed in Rule 35(c) when making way, a vessel not under command shares the same operational priority status as a vessel restricted in its ability to maneuver. Therefore, when making way (such as drifting), an NUC vessel must use the same special signal defined in Rule 35(c) (one prolonged followed by two short blasts). *** ### Explanation of why A, B, and C are incorrect options (as the final answer) While the situations described in A, B, and C all require the specified fog signal, none of the options alone covers the full scope of vessels that must sound this signal. They are incomplete answers to the multiple-choice question: * **A) Is incorrect:** It only accounts for a Vessel Restricted in its Ability to Maneuver (RAM) when anchored, ignoring sailing vessels and NUC vessels that must use the same signal while underway. * **B) Is incorrect:** It only accounts for a sailing vessel underway, ignoring RAM vessels (at anchor) and NUC vessels. * **C) Is incorrect:** It only accounts for a vessel not under command (NUC), ignoring sailing vessels and RAM vessels (at anchor).