Navy OCS Navigation Practice Test

Question: 1 / 400

Which signal indicates a trawling vessel at night?

Red over white lights

Three red lights

Green over white lights

The signal that indicates a trawling vessel at night is green over white lights. This configuration is specifically designated for trawlers to make them easily identifiable to other vessels. The green light indicates the vessel's starboard side, while the white light signals that it is engaged in fishing activities. This combination of lights is part of international maritime regulations to promote safe navigation and prevent collisions, helping other vessels to recognize the vessel's position and activity clearly.

In contrast, the other combinations of lights serve different purposes. Red over white lights typically indicate a fishing vessel that is at anchor, while three red lights might signify restricted maneuverability or a vessel that is constrained by its draft. Red over red lights indicate a vessel that is not under command. Understanding these signals is crucial for maintaining safety at sea during night operations.

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Red over red lights

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