What does four shot blast mean when your on a boat?

A "four shot blast" on a boat typically refers to a series of four short blasts from a ship's whistle or horn. This signal is often used to indicate a specific maneuver or warning, such as when a vessel is preparing to leave a dock or to alert other boats to its presence. In maritime communication, these sound signals help ensure safety and coordination among vessels, especially in crowded or restricted waters.