United States Coast Guard Captains License Practice Exam

When you hear a prolonged blast coming from around a bend, the correct action is to respond with one prolonged blast. This signal indicates that you are acknowledging the presence of another vessel that may be difficult to see due to the obstruction.

In maritime operations, sound signals are a crucial component of navigation safety, especially in situations where visibility is impaired. A prolonged blast is used to indicate your position and intentions, ensuring that others are aware of your presence and helping to prevent potential collisions.

Responding in this manner helps maintain clear communication between vessels, particularly in areas with limited visibility or where navigating around bends could create blind spots. It promotes safer interactions on the water by signaling to other vessels that you are aware and are taking appropriate action.

The other choices do not adequately contribute to communication or the prevention of collisions. Backing the engines or stopping to drift may leave you vulnerable or could create confusion rather than enhancing safety through proper signaling. Sounding a danger signal isn't the appropriate response in this scenario, as it is designated for situations where immediate danger is imminent, not simply for recognizing another vessel's presence.