b.
When set to a QFE altimeter setting, will indicate height above the QFE reference datum; and

c.
When set to a pressure of 1013.2 hectopascal (1013.2 millibars), may be used to indicate Flight Levels.

NOTE 2. - The terms height and altitude, used in Note 1 above, indicate altimetric rather than geometric heights and altitudes.
FLIGHT LINE - A term used to describe the precise movement of a civil photogrammetric aircraft along a predetermined course(s), at a predetermined altitude, during the actual photographic run.
FLIGHT MANAGEMENT SYSTEMS - A computer system that uses a large data base to allow routes to be preprogrammed and fed into the system by means of a data loader. The system is constantly updated with respect to position accuracy by reference to conventional navigation aids. The sophisticated program and its associated data base insures that the most appropriate aids are automatically selected during the information update cycle.
FLIGHT PATH (P/CG) - A line, course, or track along which an aircraft is flying or intended to be flown. (See Track, Course)
FLIGHT PATH (NATO) - The line or way connecting the continuous position occupied, or to be occupied, by an aircraft, missile or space vehicle as it moves through air or space.
FLIGHT PLAN (P/CG) - Specified information relating to the intended flight of an aircraft, that is filed orally or in writing with a Flight Service Station or an Air Traffic Control facility. (See Fast File, Filed)
FLIGHT PLAN (JCS, NATO, ICAO) - Specified information provided to air traffic services units, relative to an intended flight or portion of a flight of an aircraft.
FLIGHT PLAN AREA - The geographical area assigned by regional air traffic divisions to a Flight Service Station for the purpose of Search And Rescue for VFR aircraft, issuance of NOTAMs, pilot briefing, inflight services, broadcast, emergency services, flight data processing, international operations, and aviation weather services. Three letter identifiers are assigned to every Flight Service Station and are annotated in Air Field Directory's and Order 7350.8 series as tie-in-facility. (See Fast File, Filed) FLIGHT RECORDER (P/CG) - A general term applied to any instrument or device that records information about the performance of an aircraft in flight, or about conditions encountered in flight. Flight recorders may make records of airspeed, outside air temperature, vertical acceleration, engine revolutions per minute, manifold pressure, and other pertinent variables for a given flight.
FLIGHT RECORDER (ICAO) - Any type of recorder installed in the aircraft for the purpose of complementing accident/incident investigation.
FLIGHT SERVICE STATION/FSS - Air traffic facilities which provide pilot briefing, enroute communications and VFR Search And Rescue service, assist lost aircraft and aircraft in emergency situations, relay Air Traffic Control clearances, originate Notices to Airman, broadcast aviation weather and NAS information, receive and process IFR flight plans, and monitor navaids. In addition, at selected locations, FSSs provide enroute Flight Advisory Service (Flight Watch), take weather observation, issue airport advisories, and advise Customs and Immigration of transborder flight.