IEEE 521:1976

- Superseded.
Radar systems operate in frequency bands that since World War II have been identified by letter
designations. Over a period of time these frequencies and their associated letter-band designations
have been fixed by usage. In order to recognize and preserve accepted usage, this standard defines
the letter-band nomenclature to be used as a convenience for describing the frequency in which
radar operates. It should be cautioned that these are not a substitute for the specific frequency
limits of a radar, nor is it meant that these letter bands be applied to other than radar.