ly, have them send
to each other, limiting the work at first to letters only. Then
gradually work up to the point where they may send simple messages.
Make them rely upon the flags for communicating during the practice.
Do not permit conversation--separate the men by a considerable
distance. In both wig wag and semaphore instruction the same plan
should be followed as in teaching a foreign language; _i.e._, confine
all communication to the medium under study. Qualification tests are
similar to those for the semaphore, except that less speed can be
exacted; 15 characters per minute or 10 combinations of 5 letters each
to be received and written down in 5 minutes.

In both the semaphore and the wig wag men should be taught the
conventional signals used in field work. These can be found in any
manual on the subject.

POINTS TO REMEMBER.

The semaphore is a quicker means of communication than the wig wag;
but the wig wag can be used in a prone position under shelter.

Lanterns can be used at night for semaphoring.

Acetylene lamps can be used at night in place of the wig wag. In this
case a short flash represents a dot, a long flash a dash.

A few men in each company should be developed into expert signalers;
some men always show aptitude for this sort of thing.

Frequent use should be made of signaling in field work.

Letter Codes.

INFANTRY.

For use with General Service Code or semaphore hand flags.

--------------+---------------------------+----------------------------
Letter of | If signaled from the rear | If signaled from the firing
alphabet | to the firing line | line to the rear
--------------+---------------------------+----------------------------
AM | Ammunition going forward. | Ammunition required.
CCC | Charge (mandatory at | Am about to charge if
| all times). | no instructions to the
| | contrary.
CF | Cease firing | Cease firing.
DT | Double time or "rush." | Double time or "rush."
F | Commence firing. |
FB | Fix bayonets. |
FL | Artillery fire is causing |
| us losses. |
G | Move forward. | Preparing to move forward.
HHH | Halt. |
K | Negative. |
LT | Left.