Appendix B Abbreviations and Terms (cont)

Appendix B Abbreviations and Terms (cont) - TM-1-1520-238-10_592

Appendix B Abbreviations and Terms (cont) - TM-1-1520-238-10_594

TM-1-1520-238-10 Helicopter Attack AH-64A Apache Manual
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TM 1-1520-238-10 B-12 Change 9 Appendix B – Abbreviations and Terms (cont) NAV LT Navigation Light NDB Nondirectional Beacon NFOV Narrow Field of View NG, N_G Engine Gas Generator Speed NSA Night Sensor Assembly NM Nautical Mile NOE Nap Of the Earth NP, N_p Engine Power Turbine Speed NR, N_r Main Rotor Speed NRML, NORM Normal NVS Night Vision System O OAT Outside Air Temperature ODV Overspeed and Drain Valve OEI One Engine Inoperative OFP Operational Flight Program OFS Offset OGE Out of Ground Effect OI Optical Improvement OPR Operator ORT Optical Relay Tube OTBD Outboard Overtemp Overtemperature ORIDE Override OUTBD Outboard OVRD Override

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