What is the "Underway" signaling flag used for?

The "Underway" signaling flag is specifically designed to indicate that a ship is in motion, meaning that it is making way through the water and is not anchored or moored. This flag serves as a crucial communication tool to convey the operational status of the vessel to other ships and personnel, ensuring safe navigation and interactions at sea.

Ships often utilize this flag to communicate their readiness to navigate, which is essential for other vessels in the vicinity, as it helps in coordinating movements and avoiding potential collisions. Given its function, this signaling flag is an important aspect of maritime operations and safety protocols.