BOTH INTERNATIONAL & INLAND A tug is towing three manned barges in line in fog. Which signal, if any is the first vessel of the tow required to sound?

Correct Answer: Option B — No fog signal is required

Rule 35(c) specifies that only the towing vessel and the last manned vessel of a tow are required to sound fog signals. Intermediate vessels in a tow, whether manned or unmanned, are not required to sound any fog signal, as their presence is covered by the towing vessel's signal.