INLAND ONLY While underway and in sight of another vessel a mile ahead you put your engines on astern propulsion. Which statement concerning whistle signals is TRUE?

Correct Answer: Option A — You need not sound any whistle signals.

Under 33 CFR 83.34(a) (Inland Rules), maneuvering and warning signals involving astern propulsion are required only when vessels are in sight of one another and meeting or crossing, not when separated by a mile without risk.