The Two-arm Semaphore Code
(See [Plates I] and [II])
[863]. Semaphore signaling may be done with or without flags. Without flags it is rarely dependable beyond 600 yards.
In sending stand with feet apart, squarely facing the receiver.
In making letters which require the use of both arms on the same side of body, twist the body to that side and bend at waist, so as to throw both arms well away from body. But be careful to keep arms in plane of original position of body.
When a letter repeats—bring both hands (if a two-armed letter) to chest after first, then make second.
Do not try to send rapidly so as to exhibit your ability. Remember that the receiver's ability determines the speed to be used. Anyone can send faster than he himself can receive. If you want to display your skill have some one send rapidly to you.
In receiving, if you miss a letter—let it go and get the others. If you miss a word signal—"O" (waving flags or arms) and signal the last word you have received.
Rapidity is secondary to accuracy.
Take the positions for the various letters accurately. The horizontal position should not incline upward nor downward. In making an "L," for example, if the left arm is midway between its proper position and the horizontal it is difficult to tell whether it is L or M.