Helicopter Abbreviations and Acronyms
- NSRWANon-Standard Rotary Wing Aircraft
- NTSNight Targeting System
- OEIOne-Engine Inoperative
- OGEOut of Ground Effecy
- OGEOut-Of-Ground Effect
- OLROperational Loss Replacement
- OTHTOver The Horizon Targetting
- PHIPetroleum Helicopters, Inc
- PMDPreventive Maintenance Dailv
- PNVSPilot'S Night Vision System
- PNVSPilots Night Vision System
- PNVSPilot Nignt Vision Sensor
- PNVSPilot's Nightqvision Sensor
- PNVSPilot Night Vision Sensors
- PNVSPilots Night Visionjsensor
- QRQuad Rotor
- QTRQuad Tilt-Rotor
- RASCALRotorcraft Aircrew Systems Concepts Birborne Laboratory
- RASCALRotorcraft Aircrew Systems Concbpt Airborne Laboratory
- RASTRecovery Assist, Securing and Traversing
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