MIL-HDBK- 162A
Volume 1
15 December 1965
Section 3
DATE: 1 July 1964
ITEM NAME: INDICATOR GROUP
COGNIZANT SERVICE: USN
TYPE: AN/SPA-31
FEDERAL STOCK NUMBER:
USA
USN
USAF
USMC
STATUS OR TYPE CLASSIFICATION
Std
Mfg(s) Name or Code Number: Hughes Aircraft Company
Illustration Not Available
Range Limits: O to 160 mi
FUNCTIONAL DESCRIPTION
Height Limits: O to 75, 000 ft
The AN/SPA-31 is a range and height indicator that
Operating Voltages and Power Requirements:
displays the scalar distance between a reference point
115v, 58 to 62 cps, 1-ph, 8.6 amp, 990 va,
and a target, and the vertical distance between a
0.96 pf
reference point and a target.
Presentation: Range and height indicator
RELATION TO SIMILAR EQUIPMENT
INSTALLATION CONSIDERATIONS
The AN/SPA-31 is similar to,
but
not
Siting:
interchangeable with, the Navy Model VL-1.
Mounting: Deck mounted.
Cabling Requirements:
TECHNICAL DESCRIPTION
Related Equipment:
Pulse Repetition frequency: 470 to 2, 800 pps
PRINCIPAL COMPONENTS AND PHYSICAL DATA
COMPONENT
QTY
HEIGHT
WIDTH
DEPTH
UNIT WT.
(Inches)
(Inches)
(Inches)
(Pounds)
Height Indicator IP-499/SPA-31
1
40-3/8
19-1/2
24-3/8
489
Correlator-Indicator SN-237/SPA-31
1
28-3/8
11-3/4
24-1/2
165
REFERENCE DATA AND LITERATURE
Technical Manuals:
NAVSHIPS 91511A
NAVSHIPS 92969A
AN/SPA-31: 1
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