BOTH INTERNATIONAL & INLAND In restricted visibility, when must a towed vessel sound a fog signal?

Correct Answer: Option C — When it is the last vessel in the tow and it is carrying a crew

Rule 35(c) specifies that a vessel being towed, or if more than one vessel is towed, the last vessel of the tow, if manned, shall at intervals of not more than two minutes sound four blasts in succession: one prolonged followed by three short blasts.