Volume 1
MIL-HDBK-162A
Section 3
15 December 1965
AN/SPN-5, -5X, -5Y, -5Z
Type of Presentation: 12-in. PPI
FUNCTIONAL DESCRIPTION
Ranges and Intervals of Range Marks:
0 to 1.5 mi position - 0.5 ml intervals
Radar Sets AN/SPN-5, -5X, -5Y, -5Z are search radar
0 to 4 mi position - 1 mi intervals
sets, used in a fixed installation on oceangoing vessels.
0 to 8 mi position - 2 mi intervals
The set is a navigational aid that furnishes position
0 to 20 mi position - 5 mi intervals
information on other vessels, buoys, channel markers
0 to 40 mi position - 10 mi intervals
and coast lines. Target position information consists of
Duty Cycle: .00075
range and bearing.
Pulse Repetition Rate:
1.5-, 4-, and 8-mi ranges, 3, 000 cps;
RELATION TO SIMILAR EQUIPMENT
20- and 40-mi ranges, 750 cps
Pulse Width:
AN/SPN-5, -5X, -SY, -5Z is functionally and
1.5-, 4-, and 8-mi ranges, 0.25 sec;
electrically interchangeable (as a whole) with AN/ SPN-
20- and 40-mi ranges, 1 sec
5A, -5AX, -5AY, -5AZ, -5B except the AN/SPN-SB
includes de-icing, true bearing, and variable range-
Range Accuracy: 1%
marker features.
Azimuth Accuracy: 2 deg
Beam Width: 1.8 deg at half-power points
TECHNICAL DESCRIPTION
INSTALLATION CONSIDERATIONS
Frequency: 9320 to 9430 mc
Range: 81, 070 yd (max); 80 yd (min)
Siting: If possible, locate the antenna on either
Peak Power Output: 30 kw
side of the ship, rather than amidships. The
Operating Voltages and Power Requirements:
waveguide run should not exceed 75 ft from
AN/SPN-5 - 115 vac, 60 cps, 1-ph, 12 amp,
the base of the antenna unit to the top of the
0.85 pf
transmitter-receiver unit.
AN/SPN-5X - 115 vdc, 20 amp
Mounting:
AN/SPN-5Y - 230 vdc, 24 amp
Cabling Requirements:
AN/SPN-5Z - 230 vac, 60 cps, 1-ph, 6.5 amp,
Related Equipment:
0.85 pf
PRINCIPAL COMPONENTS AND PHYSICAL DATA
COMPONENT
QTY
HEIGHT
WIDTH
DEPTH
UNIT WT.
(Inches)
(Inches)
(Inches)
(Pounds)
Radar Receiver-Transmitter
1
53-3/4
19-3/8
20-1/2
326
RT-161/SPN-5
Radar Indicator Control IP-51/SPN-5
1
47
18
28-1/2
230
Antenna AS-444/SPN-5
1
32
17
18
148.5
Motor Starter SA-166/U (5Y only)
1
9-1/2
6-13/16
6-29/32
13.5
Motor Starter SA-167/U (5X only)
1
11-3/4
7-1/8
8-5/8
18
Circuit Breaker SA-172/SPN-5(5only)
1
8-5/8
4-3/8
6-1/8
6.5
Circuit Breaker SA-173/SPN-5
1
8-5/8
4-3/8
8-1/8
6.5
(5Z only)
Switch Box SA-174/SPN-5 (5X only)
1
7-1/4
4
6-1/2
4.25
Switch Box SA-175/SPN-5
1
11-3/4
5-1/4
9-5/8
9
(5, 5Y, 5Z only)
AN/SPN-5: 2
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