Marine signal flag: Letter "Q" (Quebec) Coastal Waters of Southeast Alaska and British Columbia NOAA Nautical Chart 18581: Yaquina

NOAA Nautical Chart 18581: Yaquina Bay and River

Daya Wan and Approaches to Huizhou is a standard nautical chart

Approaches to Puerto de la Luz (Las Palmas) is a standard nautical chart

British Admiralty Nautical Chart 3767: North Sea - Germany and Denmark

Marine signal flag: Letter "Q" (Quebec) Coastal Waters of Southeast Alaska and British Columbia NOAA Nautical Chart 18581: YaquinaInternational maritime signal message: "Ship meets health regs; request clearance into port" Marine signal flags are international signals used by ships at sea to spell out short messages, or more commonly, used individually or in combination they have special meanings.