Which channel is utilized for the required bridge-to-bridge watch?

Correct Answer: Option C — VHF-FM on Ch-13 in most areas of the continental United States.

The Bridge-to-Bridge Radiotelephone Act requires vessels to maintain a continuous watch on VHF Channel 13. This channel is specifically designated for navigational safety and bridge-to-bridge communication in U.S. waters, ensuring that vessels can coordinate maneuvers and avoid collisions effectively without cluttering the distress frequency, Channel 16.