Question 46 GLI01 - Master-Unlimited Tonnage

The Correct Answer is D The required fog signal of **one prolonged blast followed by two short blasts** is designated in both the International Regulations for Preventing Collisions at Sea (COLREGs) Rule 35(c) (International) and Inland Rule 35(c) (Inland) for specific categories of vessels when making way through the water. This signal is sounded at intervals of not more than 2 minutes. **Why Option D ("All of the above") is correct:** Rule 35(c) (Sound Signals in Restricted Visibility) explicitly applies the signal of one prolonged followed by two short blasts to: 1. **A vessel restricted in its ability to maneuver (RAM)** (This covers the scenario in option A, if the RAM vessel is underway or making way, but the specific signal also applies to a RAM vessel at anchor, as explained below). 2. **A vessel not under command (NUC)** (Option C). 3. **A vessel constrained by its draft (CBD)** (International only, but not listed as an option). 4. **A fishing vessel (engaged in fishing)**. 5. **A sailing vessel** (Option B). 6. **A towing or pushing vessel** (certain types of tows). Since options A, B, and C all represent categories of vessels required to use this specific signal (or a variation of it for A, as noted below, depending on whether it is underway or anchored, but the intent is to cover the categories of vessels that use this signal), D is the correct comprehensive answer. *Note regarding A (A vessel restricted in its ability to maneuver, at anchor):* While the signal of one prolonged followed by two short blasts is the standard signal for a RAM vessel when **making way** (Rule 35(c)), a RAM vessel **at anchor** is required to sound the anchor signal (Rule 35(g): rapid ringing of the bell for 5 seconds every minute, and possibly the gong) **and** is permitted (or required, depending on jurisdiction and interpretation) to sound the signal of one prolonged followed by two short blasts to indicate its status (Rule 35(h)). Since a RAM vessel belongs to the category of vessels that use this specific signal sequence, and because Rules 35(f) and 35(h) allow/require certain vessels at anchor to supplement the standard anchor signal with this special signal, the category represented by A is included. **Why each of the other options is technically incorrect as the sole answer:** * **A) A vessel restricted in its ability to maneuver, at anchor:** This is a correct answer, but it is incomplete because sailing vessels and vessels not under command also use this signal. * **B) A sailing vessel underway:** This is a correct answer, but it is incomplete because RAM vessels and NUC vessels also use this signal. * **C) A vessel not under command:** This is a correct answer, but it is incomplete because RAM vessels and sailing vessels also use this signal.