Marine signal flag: Letter "Q" (Quebec) Coastal Waters of Southeast Alaska and British Columbia NOAA Nautical Chart 11013: Straits

NOAA Nautical Chart 11013: Straits of Florida and Approaches is a standard navigation chart used by commercial and recreational mariners alike

Sabine Pass and Approaches to Port Arthur and Beaumont is a standard nautical chart

British Admiralty Nautical Chart 1425: France

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 11013: StraitsInternational 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.