You are approaching Gallipolis Lock and Dam. The traffic signal light is flashing red. You should __________.

Correct Answer: Option C — hold your position and not attempt to enter the lock

A flashing red light at a lock and dam facility is a mandatory stop signal. It indicates that the lock is currently unavailable for entry, perhaps due to ongoing operations or maintenance. Vessels must hold their position at a safe distance until the signal changes to flashing green.