Under the Inland Navigation Rules, what does a one short blast signal mean when meeting another vessel?

The correct interpretation of a one short blast signal under the Inland Navigation Rules is that it indicates the intention to leave the other vessel on the starboard side. This communication is a standardized way for vessels to signal their navigational intentions to maintain safety and avoid collisions when approaching each other.

In the context of navigation, signaling is crucial for mutual understanding between vessels, especially when visibility is limited. A one short blast conveys a clear maneuvering decision, allowing both vessels to adjust their courses accordingly. This signaling is part of a broader set of rules designed to promote organized and safe navigation on waterways.

The other interpretations provided do not align with the meaning of a one short blast. A vessel leaving another on the port side would use a different signal, while uncertainty about intentions or the action of towing another vessel would require different forms of communication. Therefore, understanding these signals is vital for safe interactions in tight navigation scenarios.