Appendix B - Acronyms and Abbreviations

LC—local control MED—medium LCF—local control facility METI—meteorological information LCN—local communications network MF—middle frequency LCTD—located MFJ—modified final judgment LDA—localizer-type directional aid; landing directional aid MFT—meter fix crossing time/slot time LDG—landing MHA—minimum holding altitude LDIN—lead-in lights Mhg—Meghertz LEC—local exchange carrier MIA—minimum IFR altitudes LF—low frequency MIDO—Manufacturing Inspection District Office LGT—light or lighting MIN—minute LGTD—lighted MIRL—medium intensity runway lights LINCS—leased interfacility NAS C MIS—Meteorological Impact Statement LIRL—low intensity runway lights MISC—miscellaneous LIS—logistics and inventory system MISO—Manufacturing Inspection Satellite Office LLWAS—low level wind shear alert system MIT—miles in trail LLZ—localizer MITRE—Mitre Corporation LM—compass locator at ILS middle marker MLS—microwave landing system LM/MS—low/medium frequency MM—middle marker LMM—locator middle marker MMAC—Mike Monroney Aeronautical Center LO—compass locator at ILS outer marker MMC—maintenance monitoring console LOC—local; locally; location; localizer MMS—maintenance monitoring system LOCID—location identifier MNM—minimum LOI—letter of intent MNPS—minimum navigation performance specification LOM—compass locator at outer marker MNPSA—minimum navigation performance specifications LONG—longitude airspace LPV—lateral precision performance with vertical guidance MNT—monitor; monitoring; monitored LRCO—limited remote communications outlet MOA—memorandum of agreement; military operations area LRNAV—long range navigation MOC—minimum obstruction clearance LRR—long range radar MOCA—minimum obstruction clearance altitude LSR—loose snow on runway(s) MODE C—altitude-encoded beacon reply; altitude reporting LT—left turn mode of secondary radar MODE S—mode select beacon system M MON—Monday MOU—memorandum of understanding MAA—maximum authorized altitude MPO—Metropolitan Planning Organization MAG—magnetic MPS—maintenance processor subsystem or master plan MAINT—maintain, maintenance supplement MALS—medium intensity approach light system MRA—minimum reception altitude MALSF—medium intensity approach light system with MRC—monthly recurring charge sequenced flashers MSA—minimum safe altitude; minimum sector altitude MALSR—medium intensity approach light system with MSAW—minimum safe altitude warning runway alignment indicator lights MSG—message MAP—maintenance automation program; military airport MSL—mean sea level program; missed approach point; modified access pricing MSN—message switching network MAPT—missed approach point MTCS—modular terminal communications system Mbps—megabits per second MTI—moving target indicator MCA—minimum crossing altitude MU—mu meters MCAS—Marine Corps air station MUD—mud MCC—maintenance control center MUNI—municipal MCL—middle compass locater MUX—multiplexor MCS—maintenance and control system MVA—minimum vectoring altitude MDA—minimum descent altitude MVFR—marginal visual flight rules MDT—maintenance data terminal MEA—minimum en route altitude B-7