A power-driven boat underway in reduced visibility should sound which pattern?

A power-driven boat underway in reduced visibility should sound which pattern?

• A. One prolonged blast
• B. Two short blasts
• C. Three long blasts
• D. One short blast

Answer: (A)

In restricted visibility, sound signals tell other vessels your presence and status so they can avoid collisions. For a power-driven vessel that is underway and making way, the correct signal is a single prolonged blast, repeated at intervals of not more than two minutes. This pattern clearly communicates that you are there and moving, without implying you are stopped or about to pass another vessel. The other patterns have different meanings in COLREGS signaling and do not convey that you are actively underway in fog.

In restricted visibility, sound signals tell other vessels your presence and status so they can avoid collisions. For a power-driven vessel that is underway and making way, the correct signal is a single prolonged blast, repeated at intervals of not more than two minutes. This pattern clearly communicates that you are there and moving, without implying you are stopped or about to pass another vessel. The other patterns have different meanings in COLREGS signaling and do not convey that you are actively underway in fog.