Which flag is used to recall personnel?

The Papa Flag is used to recall personnel. In maritime signal flags, the Papa Flag signifies "All persons should report on board" or indicates that personnel should return to the ship or vessel. This signal is crucial for operations where the captain or commanding officer needs to gather crew members for critical briefings, drills, or emergencies. Its use ensures effective communication and prompt action when it is necessary for all personnel to be accounted for on board.

The Bravo Flag, on the other hand, indicates the presence of hazardous materials, serving a completely different purpose related to cargo and safety. The SOPA Flag is associated with the Senior Officer Present Afloat and is used for signaling the presence of that officer rather than recalling personnel. The Church Pennant is flown to signify that religious services are being conducted on board, not for recalling crew. Thus, the Papa Flag stands out as the correct signal for summoning personnel back to the vessel.