How does a vessel aground signal using a horn?

A vessel that is aground signals its condition to other operators by using a specific horn signal to indicate that it is stuck and may require assistance to free itself. The correct horn signal consists of two short blasts followed by one long blast. This pattern is universally recognized among mariners and provides clear communication to surrounding vessels about the situation.

Using the specified sequence helps maintain safety on the water by alerting other boaters to the presence of a vessel in distress. Understanding such signaling methods is critical for safe navigation and communication on the water, as it can prevent potential collisions or misunderstandings.

The other options present different horn signals that are used for various situations. For example, three long blasts typically signify that a vessel is reversing and is not the correct signal for a vessel aground, while prolonged ringing is often associated with other emergencies or navigational warnings.