Marine signal flag: Letter "F" (Foxtrot) Province Flags ADLL displays all information using

ADLL displays all information using instantly recognisable formats and chart symbols

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

ocean currents and swell

NOAA Nautical Chart 18721: Santa Cruz Island to Purisima Point is a standard navigation chart used by commercial and recreational mariners alike

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

Marine signal flag: Letter "F" (Foxtrot) Province Flags ADLL displays all information usingInternational 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.