What is the recommended signal for a vessel intending to communicate urgency?

The most appropriate signal for a vessel intending to communicate urgency is a series of short blasts to establish communication. This method effectively conveys that the vessel has a message that requires immediate attention without indicating an emergency, which distinguishes it from signals used for distress situations. Short blasts are universally recognized as a request for communication, prompting other vessels to pay attention and respond.

Establishing communication through short blasts allows the vessel to signal that they need to convey an urgent situation that is significant but not classified as an emergency, fitting within the protocols established by the COLREGs. Vessels on the waterway can then identify the urgency of the situation and react accordingly, ensuring safety and effective navigation.

The other signals mentioned serve different purposes. For instance, a single continuous blast is typically used to signal danger or to announce the vessel's presence. One long blast followed by two short blasts indicates that a vessel is altering course to starboard. Seven short and rapid blasts are recognized as a signal for distress, indicating a situation that requires immediate assistance. Understanding the nuances of communication signals is crucial for maintaining safety and effective communication at sea.