INLAND ONLY You have made your vessel up to a tow and are moving from a pier out into the main channel. Your engines are turning ahead. What whistle signal should you sound?
• Inland Rules – maneuvering and warning signals for vessels leaving a dock or berth • Special sound signal used when a power‑driven vessel is moving from a berth or pier into a fairway or channel • Difference between meeting/crossing/overtaking signals and departure from dock signals
• Ask yourself: Is this situation about communicating an intended course alteration to another vessel, or simply announcing that you are getting underway from the pier into the channel? • Which signal in the Inland Rules is specifically reserved for power‑driven vessels leaving a dock, berth, or pier? • Look at which choices are normally associated with danger, towing in narrow channels, or leaving a berth and match that to this exact scenario.
• Verify in the Inland Navigation Rules the exact whistle signal for a power‑driven vessel when leaving a dock or berth. • Confirm that engines are turning ahead but that this is not a meeting, crossing, or overtaking situation requiring port/starboard maneuvering signals. • Eliminate any signal that is clearly identified as a danger signal or as a signal for restricted‑visibility underway rather than for leaving a dock.
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