| 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. | Commence firing. |
| FB | Fix bayonets. | Fix bayonets. |
| FL | Artillery fire is causing us losses. | Artillery fire is causing us losses. |
| G | Move forward. | Preparing to move forward. |
| HHH | Halt. | Halt. |
| K | Negative. | Negative. |
| LT | Left. | Left. |
| O (Ardois and semaphore only) | What is the (R.N. etc.)? Interrogatory. | What is the (R.N. etc.)? Interrogatory. |
| _ _ ____ ____ _ _ (All methods but ardois and semaphore) | What is the (R.N. etc.)? Interrogatory. | What is the (R.N. etc.)? Interrogatory. |
| P | Affirmative. | Affirmative. |
| R | Acknowledgment. | Acknowledgment. |
| RN | Range. | Range. |
| RT | Right. | Right. |
| SSS | Support going forward. | Support needed. |
| SUF | Suspend firing. | Suspend firing. |
| T | Target. | Target. |
(2) The Two-arm Semaphore Code.
(See [illustrations] on pages following.)
(C.I.D.R., No. 13.)
TWO-ARM SEMAPHORE CODE.
