What sound signal indicates a turn to starboard in a head-on power boat situation?

In a head-on situation between power-driven vessels, the appropriate sound signal for a vessel that intends to turn to starboard is one short blast. This signaling rule is outlined in the International Regulations for Preventing Collisions at Sea (COLREGs), specifically addressing how vessels communicate intentions to help avoid collisions.

When a vessel is signaling a turn to starboard, the use of one short blast indicates this maneuver clearly and concisely to the other vessel. It serves as a standard means of communication, ensuring that both vessels are aware of each other's intentions, thereby promoting safety and reducing the risk of collision on the water.

The other sound signals correspond to different intentions: two short blasts indicate a turn to port, while long blasts might be used in different contexts, such as signaling for overtaking or caution. Understanding these signals is crucial for operators of vessels to navigate safely in traffic situations.