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ASG Airborne Radar


Diagram of ASG radar installed in blimp

Naval Historical Center


Specifications:


Wavelength     
10 cm
Range 18 miles or 29 km (submarine)
40 miles or 64 km (cruiser)
90 miles or 140 km (coastline)
Minimum range 400 yards (370 m)
Antenna
Parabolic
Accuracy
Range: 7%
Bearing: 3%
Display
PPI
Weight
360 lbs
160 kg
Production
5547 sets  from 1942-10 to 1945-8

Also known as "George" or AN/APS-2, the ASG played an important role in the antisubmarine war in the Atlantic. It was mounted in the PBM Mariner, PBJ Mitchell, and PB4Y Liberator. Installation in the PBJ and PB4Y required replacement of the ventral turret with the radome. The PB4Y was still under development when the ASG came into production and became the first aircraft deliberately designed with space for a radar set.

The set had provisions for IFF. It became obsolescent for antisubmarine work in the Atlantic when the Germans began using 10 cm radar detectors and the Allies were forced to switch to 3 cm radar sets.


References

Guerlac (1987)

Naval Historical Center (accessed 2009-6-6)


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