Marine signal flag: Letter "F" (Foxtrot) Province Flags however it is possible it

however it is possible it was simply to distinguish the flag from similar ones in the region

ocean currents and swell

British Admiralty Nautical Chart 1581: South Pacific Ocean

Approaches to Narragansett Bay and Buzzards Bay is a standard nautical chart

The Grenada Country Flag should not be flown after sunset

Marine signal flag: Letter "F" (Foxtrot) Province Flags however it is possible itInternational maritime signal message: "I am disabled, communicate with me" 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.