Which flag should a vessel display to indicate that it requires a pilot?

A vessel should display the Hotel flag to indicate that it requires a pilot. The Hotel flag is an international maritime signal flag, and it is denoted by a white and blue vertical striped design. This flag serves as a clear visual cue to nearby vessels and harbor authorities that the ship is in need of pilotage services for safe navigation, especially in confined or challenging waterways.

The use of maritime signal flags is crucial for effective communication at sea, and the Hotel flag specifically conveys the message of requesting a pilot, which is essential for vessels unfamiliar with local conditions or those needing assistance in maneuvering. Understanding this signal can greatly enhance safety and efficiency in marine operations, supporting smooth interaction between ships and port services.