What is the meaning of two short flashes as a light signal?

Two short flashes as a light signal specifically indicate that a vessel is operating astern propulsion. This signal serves as a clear communication tool in maritime settings, alerting nearby vessels of the maneuvers being performed, particularly when a vessel is moving backward. Effective communication via light signals is crucial for maintaining safety and preventing collisions on the water.

Understanding the meaning of light signals is essential for all seafarers. The use of specific signals allows vessels to convey their actions to others in an easily recognizable manner, enhancing situational awareness. When other vessels observe two short flashes, they can identify that the signaling vessel is engaged in astern propulsion and can take appropriate actions to ensure safety and avoid close encounters.