Question 46 GLI03 - Master-LT 500-1600 GRT

The Correct Answer is D. ### Explanation for Option D (All of the above) Option D is correct because the signal "one prolonged blast followed by two short blasts" is defined in Rule 35(c) of both the International Regulations for Preventing Collisions at Sea (COLREGs) and the Inland Navigation Rules as the distinct signal used by a variety of vessels that are limited in their ability to maneuver or are operating under specific restrictions. This signal is required for all the vessels listed in options A, B, and C: * **A) A vessel restricted in its ability to maneuver, at anchor (RAM):** A vessel restricted in its ability to maneuver (RAM) uses this signal, regardless of whether it is underway or anchored (Rule 35(c)). * **B) A sailing vessel underway:** Sailing vessels are specifically required to sound this signal (Rule 35(c)). * **C) A vessel not under command (NUC):** Vessels not under command are required to sound this signal (Rule 35(c)). Since A, B, and C are all required to sound this specific signal, "All of the above" is the correct answer. ### Why Options A, B, and C are Incorrect While A, B, and C all correctly identify vessels that use the signal (one prolonged followed by two short blasts), they are incorrect as the final answer because they are insufficient. Choosing any single option (A, B, or C) would ignore the fact that the other two vessels listed are also required to sound the exact same signal. Therefore, selecting D is necessary to include all the correct examples provided in the question.