Which signal signifies a blind bend for both, and is used inland also when leaving berth?

• A. I am altering my course to port
• B. I am operating astern propulsion
• C. Blind bend for both; used for inland also when leaving berth
• D. Yes (Vessel may overtake)

Answer: (C)

On inland waterways, there are whistle signals that communicate more than just a vessel’s maneuvers; some signals warn about special conditions like a blind bend ahead. The signal described here directly tells both vessels that there is a blind bend for both of them, and it’s also used when a vessel is leaving a berth inland. That combination of warning about restricted visibility and the inland-use context is exactly what this signal communicates, making it the best answer.

The other options describe general actions—altering course to port, operating astern propulsion, or overtaking—which convey what you’re doing or planning to do, not a caution about a blind bend or inland usage.