Towing & Ship-Assist · Sound Signals
In or near an area of restricted visibility, a manned vessel being towed (when more than one is towed, the last vessel) sounds:
- AOne prolonged blast every two minutes
- BOne prolonged followed by three short blasts, immediately after the towing vessel's signal✓ Correct
- CFive short and rapid blasts
- DTwo prolonged blasts only
Explanation
A manned towed vessel sounds one prolonged followed by three short blasts at intervals of not more than two minutes, where practicable immediately after the towing vessel's signal, identifying itself as the tail of a tow in fog.
Authority: Navigation Rules, Rule 35(e)
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