What does one short whistle blast indicate?

One short whistle blast is primarily used in maritime communication to indicate a specific intention or maneuver. In this context, it signifies that you intend to leave another vessel or object on your port side as you maneuver. This is a standard signal to communicate your intention clearly, helping to maintain safety and prevent collisions on the water.

In typical navigation scenarios, using one short blast allows other vessels or operators to understand your intended course of action and adjust their movements accordingly. This is crucial in busy waterways where multiple vessels may be interacting in close proximity.

Understanding this signal is an essential part of maritime navigation rules, often governed by the International Regulations for Preventing Collisions at Sea (COLREGs), which ensure safety and coordination among vessels.