SJ

Description:

Microwave search and torpedo-control set for submarines only. Present sets have an "A" scope only and use lobe-switching for fine determination of bearing. Later sets will also be equipped with PPI scopes. Set has provisions for IFF connections. For torpedo launching, Mark 1, 2, or 3 torpedo data computer is used.

Performance

Reliable maximum range, with antenna at 33', is 5 miles on a medium ship. Range accuracy, ± (15 yards + 0.1%). Azimuth accuracy, ± 1/4°.

Transportability:

Complete shipment includes spares for 80 days, is packed in 22 units, and weighs when crated a total of 3022 lbs. Largest package is 50" x 20" x 20", and weighs 507 lbs.

Installation:

SJ has 14 components weighing a total of 1850 lbs. Motor generator is heaviest unit - 440 lbs., 14 5/8" x 42 1/42" x 13 7/16". Antenna, which weighs 35 lbs. and measures 21.5" x 30" x 195 /8", should be mounted as high as possible.

Personnel:

Minimum operating personnel: one per shift.

Power:

Primary power required is 1.5 KVA, 115 volts, 60 cycles. Motor generator is supplied with set, if ship's power is not suitable.