Question 46

The Correct Answer is D ### Explanation for D ("All of the above") Option D is correct because all three listed vessel types (A, B, and C) are specifically designated under the International Regulations for Preventing Collisions at Sea (COLREGs) and the Inland Rules (Rule 35(c), and related rules for anchored vessels) as vessels required to sound a fog signal of **one prolonged followed by two short blasts**. This signal indicates that the vessel is restricted in its ability to maneuver or is not operating under standard power/control. ### Why A, B, and C are individually incorrect * **A) A vessel restricted in its ability to maneuver, at anchor:** This vessel type is required to sound the signal (Rule 35(c) and 35(f)). However, selecting only A would incorrectly exclude the sailing vessel (B) and the vessel not under command (C), both of which also require this signal. * **B) A sailing vessel underway:** A sailing vessel must sound this specific signal (Rule 35(c)). However, selecting only B would incorrectly exclude the restricted vessel (A) and the vessel not under command (C). * **C) A vessel not under command:** A vessel not under command (NUC) must sound this specific signal (Rule 35(c)). However, selecting only C would incorrectly exclude the sailing vessel (B) and the restricted vessel (A).