SIGNALS AND CODES.
(Extracts from Signal Book, United States Army, 1916.)
General Instructions for Army Signaling.
1. Each signal station will have its call, consisting of one or two letters, as Washington, "W"; and each operator or signalist will also have his personal signal of one or two letters, as Jones, "Jo." These being once adopted will not be changed without due authority.
2. To lessen liability of error, numerals which occur in the body of a message should be spelled out.
3. In receiving a message the man at the telescope should call out each letter as received, and not wait for the completion of a word.
4. A record of the date and time of the receipt or transmission of every message must be kept.
5. The duplicate manuscript of messages received at, or the original sent from, a station should be carefully filed.
6. In receiving messages nothing should be taken for granted, and nothing considered as seen until it has been positively and clearly in view. Do not anticipate what will follow from signals already given. Watch the communicating station until the last signals are made, and be very certain that the signal for the end of the message has been given.