unit of measure
conversions equivalences

international code of maritime signals flags

International code flags are used to signal between two ships or between ship and shore. Also called signaling flags, they are a set of flags of different colors, shapes and markings which used singly or in combination have different meanings. The flags include 26 square flags which depict the letters of the alphabet, ten numeral pendants, one answering pendant, and three substituters or repeaters.

alphabet flags
Alfa	Bravo	Charlie	Delta	Echo
Foxtrot	Golf	Hotel	India	Juliet
Kilo	Lima	Mike	November	Oscar
Papa	Quebec	Romeo	Sierra	Tango
Uniform	Victor	Whiskey	X-ray	Yankee
Zulu
numeric pennants
one	two	three	four	five
six	seven	eight	nine	zero
substitute pennants
substitute 1	substitute 2	substitute 3		code/answer

The first substitute repeats the upper flag or pennant of a hoist, the second
substitute repeats the second flag or pennant, and so on.

another communicating with flags: the semaphore flag waving system