When vessels are in sight of one another, what does two short blasts from one of the vessels mean?

When two vessels are in sight of one another, two short blasts from one vessel indicate that the vessel is altering its course to starboard. This sound signal is part of the International Regulations for Preventing Collisions at Sea (COLREGs), which aim to ensure safe navigation and provide a standardized method for signaling intentions between vessels.

In the context of navigation, understanding sound signals is crucial for maintaining safe distances and awareness between vessels. The use of two short blasts, specifically, conveys a clear and recognized intention for one vessel to veer to the right, allowing the other vessel to understand and respond appropriately, thereby facilitating safe maneuvering in close quarters.

Recognizing this signal allows mariners to anticipate the potential changes in the movement of nearby vessels and plan their own actions accordingly, which is essential for avoiding collisions in crowded or confined waterways.