MIL-HDBK-162A
Volume 1
15 December 1965
Section 3
DATE: 1 July 1964
COGNIZANT SERVICE: USN
TYPE: AN/SPA-21(XN-1)
FEDERAL STOCK NUMBER:
USA
USN
USAF
USMC
STATUS OR TYPE CLASSIFICATION
Mfg(s) Name or Code Number: The Gabriel Laboratories Div. of Gabriel Co., Needham Heights, Mass.
incorporating a larger reflector element, fed by a point-
FUNCTIONAL DESCRIPTION
source hog horn. Provision is also made to connect IFF
equipment to Radar Set AN/SPS-12, and display the
The AN/SPA-21(XN-1) was developed to improve
received signals from this equipment together with the
Radar Set AN/SPS-12 from a medium range to a long-
reflected radar signals on the same Plan Position
range high altitude surveillance radar system. An
Indicator (PPI) scope of other associated
additional six (6) db gain over the old system was
realized
by
AN/SPA-21(XN-1): 1
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