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Z code

Morse code operating signal of the US Army / NATO From Wikipedia, the free encyclopedia

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Z Code (like Q Code and X Code) is a set of operating signals used in CW, TTY and RTTY radio communication.

Distinct versions

There are at least three sets of Z codes.

1. One set of codes was originally developed by Cable & Wireless Ltd. (the Cable & Wireless Service Z code) for commercial communications in the early days of wire and radio communications.
Many of the old C&W codes are derived from mnemonics
(ZAL = alter wavelength,
ZAP = ack please,
ZSF = send faster, etc.)
The old C&W Z codes are not widely used today.
2. APCO[clarification needed] also developed a system of Z codes.[1]
3. NATO forces independently developed a later set of Z codes for military use and inter-language needs. The NATO Z codes are still in use, and are published in the unclassified document ACP-131.

There are other sets of codes internally used by Russia's military and other operating agencies.

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Examples

More information Code, Meaning ...
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See also

References

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