When the Captain is on the pier, what should be done regarding the 3rd substitute?

When the Captain is on the pier, the appropriate action is to raise the 3rd substitute. The 3rd substitute flag is a signal indicating that the commanding officer is not on board the vessel and is instead ashore. However, when the Captain is present on the pier, it signifies that the vessel is still under the command of its Captain, even if not on board, which typically requires the display of the 3rd substitute.

Raising this flag serves to inform other vessels and personnel that the Captain is present for command, helping maintain clear communication and proper protocol during in-port operations. This is crucial for maintaining order and ensuring that all personnel are aware of the command status of the ship.