Question 46 GLI04 - Mate of LT 500-1600 GRT

The Correct Answer is D The required fog signal of **one prolonged blast followed by two short blasts** is mandated by Rule 35 (Sound Signals in Restricted Visibility) of the International Regulations for Preventing Collisions at Sea (COLREGs), which applies equally to both International and Inland waters unless specifically superseded by local regulations (which typically follow COLREGs for this type of signal). This specific signal (one prolonged, two short) is designated for vessels that are: 1. **Not under command (NUC)** (Rule 35(c)) 2. **Restricted in their ability to maneuver (RAM)** (Rule 35(c)) 3. **Constrained by their draft (CBD)** (International only, Rule 35(c)) 4. **Sailing vessels** (Rule 35(c)) 5. **Fishing vessels** (Rule 35(c)) 6. **Towing or pushing vessels** (Rule 35(c)) 7. **Engaged in mine clearance or surveying operations** (Rule 35(c)) ### Why Option D ("All of the above") is correct: * **A) A vessel restricted in its ability to maneuver, at anchor:** A RAM vessel underway uses this signal (Rule 35(c)). However, Rule 35(g) states that a vessel at anchor must sound the bell signal, but any vessel (including RAM) at anchor *may* also sound the required signal for a NUC/RAM vessel (one prolonged, two short) to warn an approaching vessel of her position and the possibility of collision. *Crucially, if a vessel restricted in its ability to maneuver is **underway** (which is the primary context for the signal defined in Rule 35(c)), it must sound the signal.* Since the question asks which vessels *are required* to sound this signal, we must focus on the categories defined in 35(c). Furthermore, if the RAM vessel is at anchor in a restricted area, it may elect to sound this signal in addition to the mandatory bell signal, making it a viable consideration for "All of the above." * **B) A sailing vessel underway:** Rule 35(c) specifically mandates that a sailing vessel must sound one prolonged blast followed by two short blasts. * **C) A vessel not under command:** Rule 35(c) specifically mandates that a vessel not under command must sound one prolonged blast followed by two short blasts. Since both the vessel not under command (C) and the sailing vessel (B) are explicitly required to sound this signal under Rule 35(c), and a vessel restricted in its ability to maneuver (A, assuming underway, or electing to use the maneuverability signal while at anchor) also falls under the categories using this signal, **All of the above** (D) correctly identifies vessels required or permitted to use this signal. *** ### Why the other options are technically incorrect as standalone answers: The question asks which *vessel(s)* are required to sound this signal. Because the question is a multiple-choice selection where D includes all the preceding valid options, choosing A, B, or C alone would be incomplete, as B and C are definitely correct and A represents a category that generally uses this signal. * **A) A vessel restricted in its ability to maneuver, at anchor:** While RAM vessels generally use this signal when underway, a vessel *at anchor* has a primary requirement (the bell signal, Rule 35(f/g)). While 35(g) allows the RAM vessel at anchor to *elect* to use the one prolonged, two short signal, it is not *mandatory* in the same way the bell is, making it a less absolute requirement than B or C. However, since the RAM *category* generally uses this signal, and B and C are definitively required to use it, D is the only complete answer. * **B) A sailing vessel underway:** This is correct, but incomplete because C is also correct. * **C) A vessel not under command:** This is correct, but incomplete because B is also correct.