What is "q code"

alt. 1 (context radio English) code used as a shorthand for common messages, consisting of sequences all beginning with Q 2 (context radio English) specific code from the aforementioned set n. 1 (context radio English) code used as a shorthand for common messages, consisting of sequences all beginning with Q 2 (context radio English) specific code from the aforementioned set

The Q code is a standardized collection of three-letter codes all of which start with the letter "Q", a brevity code initially developed for commercial radiotelegraph communication, and later adopted by other radio services, especially amateur radio.

Although Q codes were created when radio used Morse code exclusively, they continued to be employed after the introduction of voice transmissions. To avoid confusion, transmitter call signs are restricted; no country is ever issued an ITU prefix starting with "Q".

Codes in the range QAA–QNZ are reserved for aeronautical use; QOA–QQZ for maritime use and QRA–QUZ for all services.