FT Feet TBL 5-1-2 Contractions Commonly Found in NOTAMs ABN ABV ACFT . ACT ADJ AGL ALS ALT ALTN/ALTNLY . AMDT APCH . ARFF . ASDA . ASOS . ASPH . ATC ATIS Aerodrome Beacon Above Aircraft Active Adjacent Above Ground Level Approach Light System Altitude Alternate/Alternately Amendment Approach Aircraft Rescue & Fire Fighting Accelerate Stop Distance Available Automated Surface Observing System Asphalt Air Traffic Control Automated Terminal Information Service AVBL . Available AWOS Automatic Weather Observing System AZM Azimuth BTN Between CAT CH . CL . CLSD . COM . CONC CONT . CTL Category Channel Centerline Closed Communication Concrete Continue/Continuously Control DCT DEP DH . DLA/DLAD DME DWPNT . Direct Depart/Departure Decision Height Delay/Delayed Distance Measuring Equipment Dew Point Temperature E ............. EB . ELEV . ENG EST EXC East Eastbound Elevate/Elevation Engine Estimated Except FAC FAF . FDC FICON FREQ . FSS . Facility Final Approach Fix Flight Data Center Field Condition Frequency Flight Service Station 5-1-6 GCA GP . GPS GRVL . Ground Controlled Approach Glide Path Global Positioning System Gravel HEL Helicopter HIRL . High Intensity Runway Lights HR . Hour ID IFR . ILS . IM IN INOP . INST INT . INTST Identify/Identifier Instrument Flight Rules Instrument Landing System Inner Marker Inch/Inches Inoperative Instrument Intersection Intensity L ............. LB . LDA LDG LGT/LGTD LIRL LNDG LOC Left Pound/Pounds Landing Distance Available Landing Light/Lighted Low Intensity Runway Edge Lights Landing Localizer MALS Medium Intensity Approach Lighting System MALSF . Medium Intensity Approach Lighting System with Sequenced Flashers MALSR . Medium Intensity Approach Lighting System with Runway Alignment Indicator Lights MCA . Minimum Crossing Altitude MDA . Minimum Descent Altitude MEA Minimum En Route Altitude MIRL . Medium Intensity Runway Edge Lights MKR . Marker MM Middle Marker MNM . Minimum MOA . Military Operations Area MOCA Minimum Obstruction Clearance Altitude MSG Message MSL Mean Sea Level MU . Designate a Friction Value Representing Runway Surface Conditions N............. NDB NE . NM . NTAP . North Nondirectional Radio Beacon Northeast Nautical Mile/s Notice To Airmen Publication Preflight