| Abbreviation | Definition |
|---|---|
| NOS | National Ocean Service |
| NOTA | Northern Oceanic Transition Area |
| NOTAM | Notice to Airmen |
| NOTOC | NOtice TO Crew |
| NPRV | Negative Pressure Relief Valve |
| NPV | Net Present Value |
| NRIA | Ngurah Rai International Airport |
| NS | Network Switch |
| NS | New Surplus |
| NSRWA | Non Standard Rotary Wing Aircraft |
| NTM | Nondestructure Testing Manual |
| NVAA | North Valley Aviation Association |
| NVFR | Night Visual Flight Rules |
| NVM | Non-Volatile Memory |
| NWAN | North West Air News |
| NWS | National Weather Service |
| NWS | Nose Wheel Steering |
| NWSS | Nose Wheel Steering System |
| NWW | Nose Wheel Well |
| O/J | Override/Jettison |