What message does the Echo Flag communicate to other vessels?

The Echo Flag, which is indicated by a flag that resembles a white flag with a black square in the center, communicates a specific message to other vessels, primarily that the ship is directing its course to starboard. This is communicated visually to ensure that vessels can navigate safely and avoid collisions. By signaling a turn to starboard, vessels in the vicinity are made aware of the maneuver, allowing them to adjust their own courses as needed to maintain safe distances from the signaling ship.

The other options present interpretations that do not align with the function of the Echo Flag. For instance, options suggesting a request for communication, directing course to port, or indicating that a vessel is disabled do not accurately convey the purpose of the Echo Flag in maritime communication. Thus, the correct answer highlights the critical aspect of navigational safety that the Echo Flag serves.