Question 20 FCP01 - First Class Pilot

The Correct Answer is D **Explanation for D (not impede the passage of vessel "B"):** This scenario involves a vessel engaged in fishing ("A") and a power-driven vessel constrained by draft (a large tanker, "B") navigating in a narrow channel. 1. **Vessel B's status:** A tanker navigating in a narrow channel is likely a vessel constrained by draft (Rule 28) or simply restricted in its ability to maneuver due to the channel limits and its size (Rule 3(h) or 3(g)). 2. **Narrow Channel Rule:** Rule 9(b) of both the International Regulations for Preventing Collisions at Sea (COLREGs) and Inland Rules states that a vessel of less than 20 meters in length or a **sailing vessel shall not impede the passage of a vessel which can safely navigate only within a narrow channel or fairway.** While fishing vessels are typically given priority over power-driven vessels (Rule 18), **Rule 9(b) takes precedence in narrow channels.** The tanker ("B") falls under the category of a vessel that can safely navigate only within the narrow channel. Therefore, Vessel "A" (fishing) has the obligation not to impede Vessel "B". 3. **Whistle Signal:** Vessel "B" sounding five short and rapid blasts is the danger or doubt signal (Rule 34(d)). In this context, Vessel "B" is signaling that it doubts Vessel "A"'s intentions, likely because Vessel "A" is positioned in a way that risks impeding the tanker's passage. 4. **Required Action:** Since Vessel "A" must not impede Vessel "B", the appropriate action is to take immediate steps to ensure the tanker's safe passage, such as hauling in lines or moving clear of the channel. **Explanation of Incorrect Options:** * **A) maintain course and speed:** This is incorrect because Vessel "A" is obligated not to impede Vessel "B" in the narrow channel (Rule 9(b)). Maintaining course and speed when the other vessel is sounding the danger signal violates the fundamental requirement to avoid impeding passage. * **B) not answer the whistle signals from vessel "B":** This is incorrect. Vessel "B" sounded the danger signal (five blasts). Vessel "A" must acknowledge the situation and take action to clear the channel, which may involve sounding maneuvering or warning signals depending on the specific action taken, although the primary obligation is to act to clear the channel immediately (Option D). Ignoring the danger signal is highly unsafe and non-compliant. * **C) sound one prolonged followed by two short blasts:** This signal indicates that the vessel is overtaking on the port side (Rule 34(c)(ii) – Inland or 34(c)(i) – International, depending on jurisdiction and agreement rules). This signal is completely irrelevant to the current situation, where Vessel "A" is being warned by the vessel that it must not impede.