Mariners Learning Practice Test

In a narrow channel, what is the signal indicating an intent to pass on the other vessel's port side?

Two prolonged followed by two short blasts One prolonged blast Three short blasts Two short blasts

Correct Answer:

Two prolonged followed by two short blasts

Explanation:

Sound signaling in COLREGS communicates maneuver intentions in close quarters. In a narrow channel, two long blasts followed by two short blasts tells the other vessel that you intend to pass on its port (left) side. The longer blasts grab attention and indicate a definite maneuver, while the shorter blasts specify the side of passing. Hearing this, the other vessel should hold course and speed or adjust as needed to give safe clearance for the pass on the port side. This pattern is specific to port-side passage; other sequences indicate different intentions and do not convey the same meaning.

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