 | |
| MAPT | Missed Approach Point |
| MCA | Minimum Crossing Altitude |
| MDA | Minimum Descent Altitude |
| MEA | Minimum En Route Altitude |
| MED | Medium |
| MIN | Minute(s) |
| MIRL | Medium Intensity Runway Lights |
| MKR | Marker |
| MLS | Microwave Landing System |
| MM | Middle Marker |
| MNM | Minimum |
| MNT | Monitor, Monitoring, or Monitored |
| MOC | Minimum Obstruction Clearance |
| MON | Monday |
| MRA | Minimum Reception Altitude |
| MSA | Minimum Safe Altitude, Minimum Sector Altitude |
| MSAW | Minimum Safe Altitude Warning |
| MSG | Message |
| MSL | Mean Sea Level |
| MU | Mu Meters |
| MUD | Mud |
| MUNI | Municipal |
| N | North |
| NA | Not Authorized |
| NAV | Navigation |
| NB | Northbound |
| NDB | Nondirectional Radio Beacon |
| NE | Northeast |
| NGT | Night |
| NM | Nautical Mile(s) |
| NMR | Nautical Mile Radius |
| NONSTD | Nonstandard |
| NOPT | No Procedure Turn Required |
| NR | Number |
| NTAP | Notice to Airmen Publication |
| NW | Northwest |
| OBSC | Obscured, Obscure, or Obscuring |
| OBST | Obstruction, Obstacle |
| OM | Outer Marker |
| OPR | Operate, Operator, or Operative |
| OPS | Operation(s) |
| ORIG | Original |
| OTS | Out of Service |
| OVR | Over |
| PAEW | Personnel and Equipment Working |
| PAX | Passenger(s) |
| PAPI | Precision Approach Path Indicator |
| PAR | Precision Approach Radar |
| PARL | Parallel |
| PAT | Pattern |
| PCL | Pilot Controlled Lighting |
| PERM | Permanent |
| PJE | Parachute Jumping Exercise |
| PLA | Practice Low Approach |
| PLW | Plow, Plowed |
| PN | Prior Notice Required |
| PPR | Prior Permission Required |
| PRN | Psuedo Random Noise |
| PROC | Procedure |
| PROP | Propeller |
| PSR | Packed Snow on Runway(s) |
| PTCHY | Patchy |
| PTN | Procedure Turn |
| PVT | Private |
| RAIL | Runway Alignment Indicator Lights |
| RAMOS | Remote Automatic Meteorological Observing System |
| RCAG | Remote Communication Air/Ground Facility |
| RCL | Runway Center Line |
| RCLL | Runway Center Line Lights |
| RCO | Remote Communication Outlet |
| REC | Receive or Receiver |
| REIL | Runway End Identifier Lights |
| RELCTD | Relocated |
| REP | Report |
| RLLS | Runway Lead-In Light System |
| RMNDR | Remainder |
| RMK | Remark(s) |
| RNAV | Area Navigation |
| RPLC | Replace |
| RQRD | Required |
| RRL | Runway Remaining Lights |
| RSR | En Route Surveillance Radar |
| RSVN | Reservation |
| RT | Right Turn |
| RTE | Route |
| RTR | Remote Transmitter/Receiver |
| RTS | Return to Service |
| RUF | Rough |
| RVR | Runway Visual Range |
| RVRM | Runway Visual Range Midpoint |
| RVRR | Runway Visual Range Rollout |
| RVRT | Runway Visual Range Touchdown |
| RWY | Runway |
| S | South |
| SA | Sand, Sanded |
| SAT | Saturday |
| SAWRS | Supplementary Aviation Weather Reporting Station |
| SB | Southbound |
| SDF | Simplified Directional Facility |
| SE | Southeast |
| SFL | Sequence Flashing Lights |
| SIMUL | Simultaneous or Simultaneously |
| SIR | Packed or Compacted Snow and Ice on Runway(s) |
| SKED | Scheduled or Schedule |
| SLR | Slush on Runway(s) |
| SN | Snow |
| SNBNK | Snowbank/s Caused by Plowing (Windrow(s)) |
| SNGL | Single |
| SPD | Speed |
| SSALF | Simplified Short Approach Lighting with Sequence Flashers |
| SSALR | Simplified Short Approach Lighting with Runway Alignment Indicator Lights |
| SSALS | Simplified Short Approach Lighting System |
| SSR | Secondary Surveillance Radar |
| STA | Straight-In Approach |
| STAR | Standard Terminal Arrival |
| SUN | Sunday |
| SVC | Service |
| SVN | Satellite Vehicle Number |
| SW | Southwest |
| SWEPT | Swept or Broom(ed) |
| T | Temperature |
| TACAN | Tactical Air Navigational Aid (Azimuth and DME) |
| TAR | Terminal Area Surveillance Radar |
| TDWR | Terminal Doppler Weather Radar |
| TDZ | Touchdown Zone |
| TDZ LGT | Touchdown Zone Lights |
| TEMPO | Temporary or Temporarily |
| TFC | Traffic |
| TFR | Temporary Flight Restriction |
| TGL | Touch-and-Go Landings |
| THN | Thin |
| THR | Threshold |
| THRU | Through |
| THU | Thursday |
| TIL | Until |
| TKOF | Takeoff |
| TM | Traffic Management |
| TMPA | Traffic Management Program Alert |
| TRML | Terminal |
| TRNG | Training |
| TRSN | Transition |
| TSNT | Transient |
| TUE | Tuesday |
| TWR | Airport Control Tower |
| TWY | Taxiway |
| UAV | Unmanned Air Vehicles |
| UFN | Until Further Notice |
| UNAVBL | Unavailable |
| UNLGTD | Unlighted |
| UNMKD | Unmarked |
| UNMNT | Unmonitored |
| UNREL | Unreliable |
| UNUSBL | Unusable |
| VASI | Visual Approach Slope Indicator System |
| VDP | Visual Descent Point |
| VIA | By Way Of |
| VICE | Instead/Versus |
| VIS | Visibility |
| VMC | Visual Meteorological Conditions |
| VOL | Volume |
| VOR | VHF Omni-Directional Radio Range |
| VORTAC | VOR and TACAN (Collocated) |
| W | West |
| WB | Westbound |
| WED | Wednesday |
| WEF | With Effect From or Effective From |
| WI | Within |
| WIE | With Immediate Effect or Effective Immediately |
| WKDAYS | Monday through Friday |
| WKEND | Saturday and Sunday |
| WND | Wind |
| WPT | Waypoint |
| WSR | Wet Snow on Runway(s) |
| WTR | Water on Runway(s) |
| WX | Weather |