BOTH INTERNATIONAL & INLAND A tug is towing three barges astern in restricted visibility. The second vessel of the tow should sound __________.

Correct Answer: Option D — no fog signal

COLREGS Rule 35(c) dictates that intermediate vessels in a towline (such as the second vessel of three) do not sound fog signals. Only the towing vessel and, if manned, the very last vessel of the tow emit fog signals.