BOTH INTERNATIONAL & INLAND A tug is towing three manned barges in line in fog. The second vessel of the tow should sound __________.

Correct Answer: Option B — no fog signal

In accordance with COLREGS Rule 35(c), intermediate vessels within a manned tow (such as the second barge in a three-vessel line) remain silent in fog. Only the lead tug and the final vessel in the tow sound fog signals.