Which sound signal indicates that a vessel is altering its course to starboard?

The sound signal of one short blast is universally recognized in maritime navigation as an indication that a vessel is altering its course to starboard. This standard is outlined in the International Regulations for Preventing Collisions at Sea (COLREGs), which provides guidance for navigational rules and communication on the water.

When a vessel intends to turn to starboard, the one short blast serves as a communication device to inform other boats of its intention, ensuring safety and preventing misunderstandings on the water. This is particularly important in busy waterways where multiple vessels may be operating close to each other.

Other sound signals represent different intentions or actions. For example, two short blasts would indicate a vessel is turning to port, while three short blasts typically signal that a vessel is backing up. One long blast is often used to signal an intention to alert others of a larger vessel or to pass in a narrow channel. Each sound signal serves a specific purpose and helps maintain order and safety at sea.