From the age of the Great White Fleet, that ejected Spain from the New World, presenting the Morse Code πDay flag.
Uniting the old long French Naval Maritime flags for 3, 1, and 4, we have another fun π-Day Flag!
Bonjour!
France had her own set of flags for the digits. It being π-Day they can be combined to make the number Pi: using 3, 1, and 4.
Enjoy this Pi-Day Flag! 3.14159
An early pioneer in signal flags, and came up with the brilliant idea of using flags to represent numbers, way back in 1823! https://charlestonmag.com/features/james_elford_s_19th_century_maritime_invention_allowed_sailors_to_communicate_across