MIL-HDBK-162A
Volume 1
15 December 1965
Section 3
DATE: 1 July 1964
ITEM NAME: AZIMUTH-RANGE INDICATOR
COGNIZANT SERVICE: USN
TYPE: IP-281/UP
FEDERAL STOCK NUMBER: 5840-510-5751
USA
USN
USAF
USMC
STATUS OR TYPE CLASSIFICATION:
Mfg(s) Name or Code Number: Raytheon Co., Waltham, Massachusetts
to repeat, at a remote point, target in formation
FUNCTIONAL DESCRIPTION
appearing at the search radar.
Targets are presented on an electrostatic-focus,
Azimuth-Range Indicator IP-281/UP is a remote plan
magnetic-deflection, 10-inch cathode-ray tube (CRT).
position indicator (PPI) designed to repeat information
Five range settings are available: 2, 4, 16 40, and 80
obtained from any standard search radar. Its purpose is
miles. Four fixed range-markers are provided on each
range setting, each marker representing one-fourth the
IP-281/UP: 1
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