![]() Both PANS-OPS and US TERPS assume values of minimum visibility available to the pilot at the lowest obstacle clearance altitude (OCA). Our pages contain various quotes with which our editorial team does not always agree. This is especially true in respect of Circling Approaches where the assumed radius of turn and minimum obstacle clearance are markedly different (see below). See also: Estimated elapsed time, Mean Sea Level, Probation, FOG, Vfr conditions Usually Microsoft's IA Inspection Authorization - added to an A&P, allows sign-off of annuals IMC Instrument Meteorological Conditions - flying in conditions below those required for VFR flight colloquially, "in the clouds" IMHO in my humble opinion LTA Lighter Than Air MEA Minimum Enroute Altitude (IFR). When a flight occurs over an area of high, mountainous terrain, it's vital that escape routes are planned so that in an emergency situation an aircraft is able to descend to an altitude below the Minimum Obstacle Clearance Altitude (). Results in sudden visibility reduction in mountainous terrain making flight below (Minimum Obstacle Clearance Altitude) impossible without ground violations. Often seen near a shower in moist areas and affects the ceiling limits. Night vision is affected by IFR altitudes due to lack of oxygen.Ībility to retain night vision very difficult.īright runway lights on a wide runway make you feel closer to the ground dim lights in haze on a narrow runway may because you to descend below the glide slope.ĭepending on the airspace concerned, the minimum IFR altitude may be a, MEA, AMA, minimum sector altitude, minimum vectoring altitude, safe altitude 100 nautical miles, transition altitude or missed approach altitude. MORAs give at least 1,000 feet altitude clearance above terrain and obstacles such as radio masts, and 2,000 feet where the terrain and obstacles exceed 5,000 feet. MOPR minimum operational performance requirements. See minimum obstruction clearance altitude. MOCA - Minimum Obstruction Clearance Altitude - Aviation Term - Abbreviation / AcronymĬlick to share on Twitter (Opens in new window)Ĭlick to share on Facebook (Opens in new window)Ĭlick to share on Google+ (Opens in new window).
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