MIL-PRF-85281C(AS)
DRAWINGS
NAVAIRWARCEN DRAWINGS
212602
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Electronic Components Assembly (HRS)
212603
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Control-Indicator (HRS)
212729
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Horizon Reference Set Outline and Installation
520895
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Stabilization Data Indicator Outline and Installation
520896
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Electronic Components Outline and Installation
520897
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Control-Indicator Outline and Installation
621154
-
Foundation Assembly (HRS)
(Copies of these drawings are available from the Commander, Naval Air Warfare Center
Aircraft Division, Code 7252, Highway 547, Lakehurst, NJ 08733-5042.)
2.3 Order of precedence. In the event of a conflict between the text of this document and
the references cited herein, the text of this document takes precedence. Nothing in this document,
however, supersedes applicable laws and regulations unless a specific exemption has been
obtained.
3. REQUIREMENTS
3.1 First article. When specified (see 6.2), a sample shall be subjected to first article
inspection in accordance with 4.1.1.
3.2 Systems description. The HRS shall provide a horizon reference which is independent of
the ship's rolling motion. The visual display shall be a roll-stabilized, lighted reference bar to be
located near the top of the hangar face of LAMPS MK III ships. The display shall be in the same
plane of vision as viewed by a LAMPS MK III SH-60B helicopter pilot conducting a normal
obstruction clearance scan during landing approach and recovery operation. The set shall be
composed of three separate components (see figure 1).
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