What does a single blast of a ship's whistle typically indicate?

A single blast of a ship's whistle is recognized as a signal indicating a turn to starboard. According to the International Regulations for Preventing Collisions at Sea (COLREGs), sound signals are used to communicate a vessel's intentions, especially when visibility is limited or in situations that may require coordination between vessels. A single blast specifically communicates the action of turning to starboard, which is essential for maintaining safe navigation and avoiding collisions.

Understanding this basic maritime communication is crucial for the Officer of the Watch to ensure safe operations at sea, especially in scenarios involving multiple vessels in close proximity.