What does the signal "_ _ . OR ." indicate in terms of overtaking?

The signal represented by "_ _ . OR ." indicates the intention of a vessel to overtake another vessel on the starboard side. This signal is specifically designed to communicate a clear and standardized message to other vessels to ensure safety and prevent collisions while navigating in close quarters.

In maritime communication, the pattern of signal lengths and spaces is critical in conveying specific actions. The two prolonged signals followed by a short signal (the first part) and a longer gap before the next set of signals convey the clear intent to pass on the starboard side, which is vital for maintaining safe navigation and understanding among mariners.

Understanding this signal is essential for vessels to communicate their maneuvers effectively, allowing for proper situational awareness and coordination, especially in busy or constrained waters. Being aware of these signals aids in adhering to the Colregs, which aim to promote maritime safety.