Volume 1
MIL-HDBK-162A
Section 3
15 December 1965
ST
Other - Provisions for IFF display
FUNCTIONAL DESCRIPTION
RF Power Source: Type 2J50 magnetron
Pulse Repetition Rate:
Radar Equipment ST is installed in submarines and is
1, 500 pps 10% and 600 pps 10%
used in conjunction with Radar Equipment SJ for
Pulse Width: 0.3 sec
detecting surface objects. The antenna is mounted in
the periscope for use at periscope depth. Provision is
Horizontal Coverage: 360 deg
made for the ST to operate into a dummy antenna during
Antenna Feed: 2- by 6-in. horn in periscope
submerged operations or when radar silence is desired
Horizontal Beam Width: 25 deg
with the equipment operating.
Vertical Beam Width: 12 deg
Antenna Gain: 15 db
Range Resolution: 75 yd
RELATION TO SIMILAR EQUIPMENT
Bearing Resolution: 20 deg
Range Accuracy: 15 yd 0.1% of range
Radar Equipment SS, SS-a, SS-1, or SS-2 may be
Bearing Accuracy: 5 deg
used to replace Radar Equipment ST.
IF. Frequency: 60 mc
TECHNICAL DESCRIPTION
INSTALLATION CONSIDERATIONS
Frequency: 10, 000 mc
Siting:
Maximum Reliable Range:
Mounting:
Battleships and Cruisers - 5 mi
Cabling Requirements:
Destroyers and Submarines - 3 mi
Related Equipment: Radar Equipment SJ; Radar
Range, Min: 250 yd
Equipment ST-a or ST-1 periscope antenna
Peak Power Output: 30 kw (0.03 kw avg)
assembly. ST-a or ST-1 radar components
Operating Voltages and Power Requirements:
needed to provide rf interconnection of the
115 vac, 60 cps, 1-ph, 1.5 kva
SS-2 radar to the periscope antenna can be
Type of Presentation:
supplied separately. The components are
Range - 5-in. A-scope of SJ at ranges of 1,
Periscope Adapter CGP-14ABH and Wave-
10, and 30 mi
guide Switching Unit CW-24AAN.
Bearing - Bearing dial
PRINCIPAL COMPONENTS AND PHYSICAL DATA
COMPONENT
QTY
HEIGHT
WIDTH
DEPTH
UNIT WT.
(Inches)
(Inches)
(Inches)
(Pounds)
Selector Unit 24AAH
1
14-3/4
16-3/16
16-9/16
95
Transmitter-Receiver 43ACU
1
13
15-11/16
19-1/2
150
Selector Control Unit 23AFP
1
3-1/2
4-5/8
7-7/8
15
Periscope Adapter 14ABB
1
48
14-3/4
14-3/4
220
Waveguide Switching Unit 24AAF
1
3-7/8
10
11-1/8
20
Echo Box 14AAX
1
15
16-1/4
18-7/8
40
Waveguide Pick-up I4ABC
1
3-7/8
8-1/8
11-1/8
16
Junction Box 62ABK
1
4-7/8
13-1/4
17-9/16
40
Dummy Antenna 66AHT
1
1-3/4
2
7-13/16
8
ST: 2
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