A fog signal consisting of one short, one prolonged, and one short indicates that the vessel is—

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Multiple Choice

A fog signal consisting of one short, one prolonged, and one short indicates that the vessel is—

Explanation:
Under reduced visibility, ships use sound signals to convey what they’re doing. A pattern of one short, one prolonged, and one short blast is the standard signal that a vessel is at anchor. This specific sequence tells others that the ship is stationary and not making way, so approaching vessels know to keep clear and proceed with caution. The other situations—being underway, not under command, or not making way—have different signals, so hearing this exact pattern uniquely identifies an anchored vessel.

Under reduced visibility, ships use sound signals to convey what they’re doing. A pattern of one short, one prolonged, and one short blast is the standard signal that a vessel is at anchor. This specific sequence tells others that the ship is stationary and not making way, so approaching vessels know to keep clear and proceed with caution. The other situations—being underway, not under command, or not making way—have different signals, so hearing this exact pattern uniquely identifies an anchored vessel.

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