Question 4 GLI08 - Limited OUPV

The Correct Answer is D. ### Explanation for Option D ("All of the above") Option D is correct because the fog signal consisting of **one prolonged blast followed by two short blasts** is specifically designated for a group of vessels defined by their limited maneuverability or status, as outlined in Rule 35(c) of both the International Regulations for Preventing Collisions at Sea (COLREGs) and the Inland Rules. This signal is required for: 1. A vessel not under command (Option A). 2. A sailing vessel (Option B). 3. A vessel restricted in her ability to maneuver (RIM) (Option C). (Though a vessel at anchor must also sound the bell signal (Rule 35(f)), the 1 prolonged + 2 short signal is the distinguishing signal indicating the vessel's RIM status). 4. A vessel engaged in fishing. 5. A vessel engaged in towing or pushing. Since all individual vessels listed in options A, B, and C fall into this group of vessels required or permitted to sound this specific signal, "All of the above" is the correct choice. ### Why the Other Options Are Not the Best Answer Options A, B, and C are not the correct answer because they are all individual examples that correctly satisfy the requirements of the fog signal, but they are incomplete. * **A) A vessel not under command:** This is a correct example of a vessel that must sound the signal, but it ignores other vessels that also must use it. * **B) A sailing vessel underway:** This is a correct example of a vessel that must sound the signal, but it ignores other vessels that also must use it. * **C) A vessel restricted in its ability to maneuver, at anchor:** This is a correct example (a vessel restricted in its ability to maneuver uses this signal regardless of whether it is underway or at anchor, although it must also sound the anchor signal). It is incomplete as an answer because it ignores options A and B. Therefore, D is the only answer that correctly accounts for all the vessels listed in the choices.