What sound signal indicates that you are altering course to port?

The signal indicating that you are altering course to port is one short blast. This sound signal is part of the International Regulations for Preventing Collisions at Sea (COLREGs), which provide guidelines for vessels to communicate their intentions on the water. When a vessel intends to turn left or alter its course to port, one short blast is used to convey this message to other nearby vessels, helping to ensure safety and the prevention of accidents on the water. This standardized signaling is crucial for maintaining clear communication among boaters and for avoiding misunderstandings that could lead to collisions.