Towing & Ship-Assist · Sound Signals

In restricted visibility, a vessel towing or pushing another vessel sounds, instead of the single prolonged blast, a signal of:

Explanation

Under Rule 35(c), a vessel towing or pushing sounds one prolonged blast followed by two short blasts at intervals of not more than two minutes. If manned, the last vessel of the tow sounds one prolonged followed by three short blasts.

Authority: Navigation Rules, Rule 35(c)

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