(Signal Corps codes) are
prescribed and should be memorized. In transmission, their concealment
from the enemy's view should be insured. In the absence of signal
flags, the headdress or other substitute may be used.

--------------+--------------------------------+---------------------------
Letter of |If signaled from the rear to |If signaled from the firing
alphabet. | the firing line. | line to the rear.
--------------+--------------------------------+---------------------------
AM |Ammunition going forward. |Ammunition required.
CCC |Charge (mandatory at all times).|Am about to charge if no
| | instructions to the
| | contrary.
CF |Cease firing. |Cease firing.
DT |Double time or "rush". |Double time or "rush".
F |Commence firing. |Commence firing.
FB |Fix bayonets. |Fix bayonets.
FL |Artillery fire is causing us |Artillery fire is causing
| losses. | us losses.
G |Move forward. |Preparing to move forward.
HHH |Halt. |Halt.
K |Negative. |Negative.
LT |Left. |Left.
O |What is the (R.N. etc.)? |What is the (R.N. etc.)?
(Ardois | Interrogatory. | Interrogatory.
and | |
semaphore | |
only.) | |
_ _ __ __ _ _ | |
|What is the (R.N. etc.)? |What is the (R.N. etc.)?
(All | Interrogatory. | Interrogatory.
methods | |
but ardois | |
and | |
semaphore.) | |
P |Affirmative. |Affirmative.
R |Acknowledgment. |Acknowledgment.
RN |Range. |Range.
RT |Right. |Right.
SSS |Support going forward. |Support needed.
SUF |Suspend firing. |Suspend firing.
T