AN/SPG-55

AN/SPG-55
	USS Mahan (DDG-42) with Mark 10 Terrier/Standard missile launcher
Country of origin	United States
Type	Missile fire-control
Precision	Fire control quality three-dimensional data

Rear view of the AN/SPG-55B aboard USS Worden (CG-18).

The AN/SPG-55 was an American tracking / illumination radar for Terrier and RIM-67 Standard missiles (SM-1ER/SM-2ER). It was used for target tracking and surface-to-air missile guidance as part of the Mk 76 missile fire control system.^[1] It was controlled by a UNIVAC 1218 computer.

Name[]

The designation "AN" stands for "Army-Navy" while "SPG" is not an acronym, but part of the MIL-STD-196E Type Designation System:^[2]

First letter (installation) - S = Water (surface ship)
Second letter (type of equipment) - P = Radar
Third letter (purpose) - G = Fire Control or Searchlight Directing

Onboard ships[]

United States Navy[]

Italian Navy[]

Variants[]

An SPG-55 on the starboard side USS America (CV-66). (center of image)

AN/SPG 55 - Original version supported Beam riding Terrier missiles.
AN/SPG 55A - Supported Beam-riding and homing Terrier missiles
AN/SPG 55B - Supported Beam-riding and homing Terrier missiles as well as newer Standard missiles.

External links[]

Radars and Computers aboard USS Sterett and other Warships during the Vietnam War

References[]

^ "MK 76 Missile Fire Control System". Archived from the original on 2009-10-24.
^ Department of Defense (1998). Department of Defense Standard Practice Joint Electronics Type Designation System. MIL-STD-196E.

[1] "MK 76 Missile Fire Control System". Archived from the original on 2009-10-24.

[196E-2] Department of Defense (1998). Department of Defense Standard Practice Joint Electronics Type Designation System. MIL-STD-196E.

[1]

[2]