If a vessel is overtaking another, what signal is used to indicate intent to overtake on the starboard side?

When a vessel is overtaking another vessel and intends to do so on the starboard side, the appropriate signal is two prolonged and one short blast. This signaling is part of the International Regulations for Preventing Collisions at Sea (COLREGs), which establish standards for maritime communication to ensure safe navigation and to avoid misunderstandings between vessels.

The signal of two prolonged blasts followed by one short blast conveys a clear intent to overtake, specifying the side on which the overtaking will occur. It informs the vessel being overtaken of the maneuver, thereby allowing for better situational awareness and cooperation between the vessels involved.

Using this signal effectively enhances safety by reducing the risk of collisions during the overtaking process. The importance of proper signaling cannot be overstated in maritime operations, as clear and standardized communication is essential for maintaining order and safety on the water.