SO

Description:

Microwave search set and torpedo control for small craft. SO and SO-3 are installed on PT boats; SO-1, SO-2, and SO-4, on escort and patrol vessels. An SO-7M, to be mounted in a one-ton reconnaissance car, is contemplated for Marine Corps use. Sets provide range and bearing of planes and surface vessels on a PPI scope. All later sets will work with gyro-compass repeaters and show true bearing indication on the PPI. There are provisions for IFF identification connections.

Performance

Estimated range with antenna at 15' is 8 miles on a large ship. Range accuracy is ± 500 yards. Azimuth accuracy is ± 4°.

Transportability:

Complete shipment is packed in 7 units, and with crating weighs 1161 lbs. Largest package is 114.5" x 38" x 24" and weighs 420 lbs; but tripod can be shipped without packaging box when air transport is necessary, thus reducing the weight from 420 lbs. to 165 lbs.

Installation:

SO has 8 components weighing approximately 375 lbs. Heaviest unit is the motor alternator and modulator assembly – 15.5" x 14.5" x 24.5" -- with a weight of 93 lbs. Antenna assembly, which weighs 59 lbs., should be 15 ft. above water, preferably higher.

Personnel:

Minimum operating personnel: one per shift.

Power:

Required power of 400 cycle 115 volts is supplied by motor generator, furnished with set. Different models of SO are supplied with motor generators suitable for various ships' power.