BOTH INTERNATIONAL & INLAND A vessel being towed, if manned, shall sound a fog signal of __________.
Official USCG Answer & Rule Citation
Correct Answer: Option C — one prolonged and three short blasts
COLREGS Rule 35(c) mandates that a manned vessel being towed sounds one prolonged and three short blasts. This distinctive signal follows the tug's warning and notifies approaching traffic that a vulnerable towed formation is following astern.
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