combinations should first be learned. The following grouping of
letters may be found helpful:

E I S H; T M O; A U V; N D B; R F L; K C Y; W P J; G Z Q.

The instructor can find many other groupings that will aid him. It
should also be pointed out that each number from one to ten consists
of five characters, and that each succeeding number follows the
previous one according to a regular method.

After the men have studied the alphabet sufficiently, 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;