INLAND ONLY You are proceeding against the current on a river in the Great Lakes System. You are meeting a downbound vessel. Both vessels are power-driven. The other vessel sounds one short blast. What action must you take?

Correct Answer: Option C — sound one short blast

33 CFR 83.34(a) (Inland Rule 34) requires power-driven vessels in sight of one another to signal their maneuvers. When meeting head-on, one short blast indicates an intention to leave the other on the port side. You must respond with one short blast to indicate agreement and execute the passing maneuver.