Order 7110.65P, Air Traffic Control, with changes

Pilot/Controller Glossary 2/17/05b. Other than mountainous areas, 1,000 feet abovethe highest obstacle within a horizontal distance of 4nautical miles from the course to be flown; orc. As otherwise authorized by the Administratoror assigned by ATC.(See MINIMUM CROSSING ALTITUDE.)(See MINIMUM EN ROUTE IFR ALTITUDE.)(See MINIMUM OBSTRUCTION CLEARANCEALTITUDE.)(See MINIMUM SAFE ALTITUDE.)(See MINIMUM VECTORING ALTITUDE.)(Refer to 14 CFR Part 91.)MINIMUM NAVIGATION PERFORMANCESPECIFICATION− A set of standards which requireaircraft to have a minimum navigation performancecapability in order to operate in MNPS designatedairspace. In addition, aircraft must be certified bytheir State of Registry for MNPS operation.MINIMUM NAVIGATION PERFORMANCESPECIFICATION AIRSPACE− Designated airspacein which MNPS procedures are applied betweenMNPS certified and equipped aircraft. Under certainconditions, non-MNPS aircraft can operate inMNPSA. However, standard oceanic separationminima is provided between the non-MNPS aircraftand other traffic. Currently, the only designatedMNPSA is described as follows:a. Between FL 285 and FL 420;b. Between latitudes 27N and the North Pole;c. In the east, the eastern boundaries of the CTAsSanta Maria Oceanic, Shanwick Oceanic, and Reykjavik;d. In the west, the western boundaries of CTAsReykjavik and Gander Oceanic and New YorkOceanic excluding the area west of 60W and southof 3830’N.MINIMUM OBSTRUCTION CLEARANCE ALTI-TUDE− The lowest published altitude in effectbetween radio fixes on VOR airways, off-airwayroutes, or route segments which meets obstacleclearance requirements for the entire route segmentand which assures acceptable navigational signalcoverage only within 25 statute (22 nautical) miles ofa VOR.(Refer to 14 CFR Part 91.)(Refer to 14 CFR Part 95.)MINIMUM RECEPTION ALTITUDE− The lowestaltitude at which an intersection can be determined.(Refer to 14 CFR Part 95.)MINIMUM SAFE ALTITUDE−a. The minimum altitude specified in 14 CFRPart 91 for various aircraft operations.b. Altitudes depicted on approach charts whichprovide at least 1,000 feet of obstacle clearance foremergency use within a specified distance from thenavigation facility upon which a procedure is predicated.These altitudes will be identified as MinimumSector Altitudes or Emergency Safe Altitudes and areestablished as follows:1. Minimum Sector Altitudes. Altitudes depictedon approach charts which provide at least1,000 feet of obstacle clearance within a 25-mileradius of the navigation facility upon which theprocedure is predicated. Sectors depicted on approachcharts must be at least 90 degrees in scope.These altitudes are for emergency use only and do notnecessarily assure acceptable navigational signalcoverage.(See ICAO term Minimum Sector Altitude.)2. Emergency Safe Altitudes. Altitudes depictedon approach charts which provide at least1,000 feet of obstacle clearance in nonmountainousareas and 2,000 feet of obstacle clearance in designatedmountainous areas within a 100-mile radius ofthe navigation facility upon which the procedure ispredicated and normally used only in militaryprocedures. These altitudes are identified on publishedprocedures as “Emergency Safe Altitudes.”MINIMUM SAFE ALTITUDE WARNING− Afunction of the ARTS III computer that aids thecontroller by alerting him/her when a tracked ModeC equipped aircraft is below or is predicted by thecomputer to go below a predetermined minimum safealtitude.(Refer to AIM.)MINIMUM SECTOR ALTITUDE [ICAO]− Thelowest altitude which may be used under emergencyconditions which will provide a minimum clearanceof 300 m (1,000 feet) above all obstacles located inan area contained within a sector of a circle of 46 km(25 NM) radius centered on a radio aid to navigation.MINIMUMS− Weather condition requirements establishedfor a particular operation or type ofPCG M−4