Manual for Noncommissioned Officers and Privates of Cavalry of the Army / of the United States 1917. To be also used by Engineer Companies (Mounted) for Cavalry Instruction and Training

by United States. War Department

Note.—In making the interval the flags are crossed downward in front of the body (just above the knees); the double interval is the "chop-chop" signal made twice; the triple interval is "chop-chop" signal made three times. In calling a station face it squarely and make its call. If there is no immediate reply wave the flags over the head to attract attention, making the call at frequent intervals. When the sender makes "end of message" the receiver, if message is understood, extends the flags horizontally and waves them until the sender does the same, when both leave their stations. Care must be taken with hand flags to hold the staffs so as to form a prolongation of the arms.

LETTER CODES.

INFANTRY.

47. For use with General Service Code or semaphore hand flags.

Letter of alphabet.	If signaled from the rear to the firing line.	If signaled from the firing 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
FB	Fix bayonets.
FL	Artillery fire is causing us losses.
G	Move forward.	Preparing to move forward.
HHH	Halt.
K	Negative.	Negative.
LT	Left.	Left.
O	What is the (R. N., etc.)?	What is the (R. N., etc.)?
(Ardois and semaphore only.)	Interrogatory.	Interrogatory.
· · — — · ·	What is the (R. N., etc.)?	What is the (R. N.. etc.)?
(All methods but ardois and semaphore.)	Interrogatory.	Interrogatory.
P	Affirmative.	Affirmative.
RN	Range.	Range.
RT	Right.	Right.
SSS	Support going forward.	Support needed.
SUF	Suspend firing.	Suspend firing.
T	Target.	Target.

CAVALRY.

48. For use with General Service Code or semaphore hand flags.

AM—	Ammunition going forward (if signaled from the rear to the front).
	Ammunition required (if signaled from the front).
CCC—	Charge (if signaled from the rear to the front).
	About to charge if no instructions to the contrary.(if signaled from the front).
CF—	Cease firing.
DT—	Double time, rush, or hurry.
F—	Commence firing.
FL—	Artillery fire is causing us losses.
G—	Move forward (if signaled from the rear to the front).
	Preparing to move forward (if signaled from the front).
HHH—	Halt.
K—	Negative.
LT—	Left.
M—	Bring up the horses (if signaled from front to rear).
	Horses going forward (if signaled from rear to front).
O—	What is the (R. N., etc.) Interrogatory. (Ardois and semaphore only.)
··—··—	What is the (R, N., etc.)? Interrogatory. (All methods but Ardois and semaphore).
P—	Affirmative.
R—	Acknowledgment.
RN—	Range.
RT—	Right.
SSS—	Support going forward (if signaled from the rear to the front).
	Support needed (if signaled from the front.)
SUF—	Suspend firing.
T—	Target.

FIELD ARTILLERY.

49. For use with General Service Code or semaphore hand flags.