Radar, AA, No. 2, Marks I through VII were a 1.5 metre wavelength Searchlight Control (SLC) radar known as 'Elsie'. The only difference between these Marks was the mounting arrangement. Marks VIII and IX were centimetric versions that did not see service.[46][47]
150 cm Searchlight fitted with No. 2 Mk VI SLC radar
From February 1943 the US used a universal system to identify radar variants, consisting of three letters and a number, respectively designating platform, type of equipment, function, and version. This system was continued after WWII with multiservice designations being prefixed by 'AN/' for Army-Navy. BuShips 1943 classifications
Prefix
Designation
A
Aircraft, used in combination with other letters
B
IFF
C
Experimental
D
Direction-finding
E
Emergency power
F
Fire control radar
FS
Frequency shift keying
G
Aircraft transmitting
H
Sonar hoists
I
Intercept radar, aircraft only
J
Passive sonar, for submarines
K
Sonar transmitting
L
Precision calibration
M
Radio transceiver
N
Echo-sounding
O
Measuring, for operator training
P
Automatic transmitting and receiving
Q
Sonar, for surface ships
R
Radio receiver
S
Search
T
Radio transmitter
U
Remote control
V
Radar display
W
Submarine sonar
X
Experimental
Y
Radar homing beacon
Z
Airborne navigational aids, later replaced with ARN and APN
AN/SPS-3 Also known as XDK, 3D target designator/rapid volume search radar jointly developed by MIT Radiation Laboratory and Naval Research Laboratory.[53]
AN/SPS-4 Surface and low altitude air search radar by Raytheon.[53]
AN/SPS-59 Military designation for the LN-66 short-range navigation radar manufactured by Marconi of Canada. In service in many US Navy ships as well as in the SH-2F LAMPS I ASW helicopter.[citation needed]
AN/SPS-61 Teledyne-Ryan's entrant into the 1967 emergency missile-detection radar program won by Westinghouse's AN/SPS-58, never went to production.[55]
AN/SPS-62 Westinghouse's improvement of AN/SPS-58 with nine examples were ordered in 1973 but quickly cancelled, it appears that Westinghouse simply rolled some of AN/SPS-62's features into AN/SPS-58D.[56]
AN/SPS-63 US designation for Italian 3RM-20H surface search radars by Dynell Electronics.[53]
AN/SPS-64 Navigation radar, a surface navigation and search radar, made by Raytheon and used both commercially (brand name Mariner's Pathfinder) and by navies worldwide.[citation needed]
AN/SPS-65 Development of AN/SPS-58 by Westinghouse as a low altitude radar that is part of the Mark 91 Fire Control System for the Sea Sparrow air defense missiles.[57]
AN/SPS-66 Small boat navigational radar by Raytheon.[53]
AN/APQ-187 Silent Knight Ka-band terrain following/terrain avoidance radar for the MH-60M, MH-47G, CV-22, and MC-130J, replacing the AN/APQ-170, AN/APQ-174 and AN/APQ-186[76]
AN/APY-11 US designation for Elta EL/M-2022[85] maritime, littoral and surveillance radar jointly produced by ITT Exelis to support the United States Coast Guard's Long Range Surveillance HC-130J aircraft.[86]
↑ Mei, Fu S. "Medium Range Air Defense Radar," Taiwan Defense Review, June 19, 2006.
1 2 O'Halloran, James C. "Tien Kung I low-to-medium-altitude surface-to-air-missile system, pages 299-300," Jane's Land-Based Air Defense, 2002-2003 Edition.
Polmar, Norman (December 1978). "The U.S.Navy: Shipboard Radars". United States Naval Institute Proceedings.{{cite journal}}: Cite journal requires |journal= (help)
Polmar, Norman (July 1981). "The U.S.Navy: Sonars, Part 1". United States Naval Institute Proceedings.{{cite journal}}: Cite journal requires |journal= (help)
Routledge, Brig N. W., History of the Royal Regiment of Artillery: Anti-Aircraft Artillery 1914–55, London: Royal Artillery Institution/Brassey's, 1994, ISBN1-85753-099-3
Sayer, Brig A. P., Army Radar, London: War Office, 1950.
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