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Z code

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Z Code (like Q Code and X Code) is a set of codes used in CW, TTY and RTTY communication. Developed after Q Code by Cable & Wireless Ltd. for commercial communications it was later used and modified by NATO forces, the United States Coast Guard and the USSR's millitary. Z Code is not widely used today.

CodeMeaning
Some Example Z Codes
ZALAlter your wavelength
ZAPAcknowledge, please
ZBKAre you receiving my traffic clear?
ZBK1I am receiving your traffic clear
ZBK2I am receiving your traffic garbled
ZSFSend faster

See also: Common Morse code abbreviations in the Morse code article

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