unit of measure
conversions equivalences

semaphore flag signaling system

The semaphore flag signaling system is an alphabet signaling system based
on the waving of a pair of hand-held flags

A or 1	B or 2	C or 3	D or 4	E or 5	F or 6
G or 7	H or 8	I or 9	J	K or zero	L
M	N	O	P	Q	R
S	T	U	V	W	X
Y	Z	numerical	annull	error