| Acronym | Meaning |
 | FIM | Framework Information Model |
| FIPS | Federal Information Processing Standards |
| FIR | Flight Incident Recorder |
| FIREBRAND | Anti Ship Missile Target |
| FJAG | Framework Joint Activity Group |
| FL | Foot-lambert |
| FLEETEX | Fleet Exercise |
| FLIR | Forward Looking Infrared |
| FLOLS | Fresnel Lens Optical Landing System |
| FLR | Field Level Repairable |
| FLR | Flare |
| FLT | Flight |
| FLTNO | Flight Number |
| FLTR | Filter |
| FM | Frequency Modulation |
| FM | From |
| FM/GS | Fuel Management/gauging System |
| FMA | Field Modification Activity |
| FMC | Full Mission Capable |
| FMCM | Full Mission Capable |
| FMEA | Failure Mode And Effects Analysis |
| FMEA | Flight/mission Essential Functions |
| FMECA | Failure Mode Effects And Criticality Analysis |
| FMF | Fleet Marine Force |
| FMI | Failure Mode Indicator |
| FMP | Fleet Modernization Program |
| FMS | Fault Management System |
| FMS | Foreign Military Sales |
| FMU | Fuel Management Unit |
| FOB | Freight On Board |
| FOC | Focus |
| FOD | Field Operations Division |
| FOHMD | Fibre-optic Helmet-mounted Display/device |
| FOM | Facilitate Other Maintenance |
| FOR | Field Of Regard |
| FORM | Formation |
| FOSI | Functional Output Specification Instance |
| FOTM | Functionally Oriented Technical Manual |
| FOUO | For Official Use Only |
| FOV | Field Of View |
| FPLN | Flight Plan |
| FPM | Feet Per Minute |
| FPMU | Fuel Pump Metering Unit |
| FPMUL | Fuel Pressure Metering Unit Left Engine |
| FPMUR | Fuel Pressure Metering Unit Right Engine |
| FPS | Feet Per Second |
| FPT | Fleet Project Team |
| FPUM | Fuel Pressure Metering Unit |
| FPV | Flight Path Vector |
| FQR | Formal Qualification Review |
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