What signal indicates a vessel is altering course to starboard?

The signal indicating that a vessel is altering course to starboard is a short blast. According to the International Regulations for Preventing Collisions at Sea (COLREGs), a short blast is used as a sound signal to communicate various intentions. Specifically, one short blast indicates that a vessel intends to alter its course to starboard.

This can often be observed in navigational situations where vessels are communicating with each other to avoid collisions and ensure safe passage. The use of sound signals is crucial in conveying actions that may not be visible to other vessels, especially in conditions with limited visibility. Understanding this signaling system is vital for safe maritime operations.