Aeronautical Terms beginning with F
FA
Fix to an Altitude (path terminator per ARINC Specification 424)
FAA
Federal Aviation Administration
FAF
Final Approach Fix
FAS
Final Approach Segment
Fault Detection and Exclusion (FDE)
A RAIM algorithm that can automatically detect and exclude a faulty satellite from the position solution when a sufficient number of redundant satellite measurements are available.
FD
Flight Director
FDE
Fault Detection and Exclusion
FGS
Flight Guidance System
FIR
Flight Information Region
FIS
Flight Information Services
Fixed Radius Transition (FRT)
An arc at a constant (specified) radius that is tangent to both the inbound and outbound en route path segments at an en route fix.
FL
Flight Level
Flight Guidance System (FGS)
A system primarily intended to assist the flightcrew in the basic control and tactical guidance of the airplane. Typically referred to as an autopilot (AP)/flight director (FD)/autothrust system, it may consist of sensors, computers, power supplies, servo-motors/actuators, and indications and controllers necessary for the pilot to manage and supervise the system. For rotorcraft, it can include a FD with a stability augmentation system and/or AP.
Flight Management System (FMS)
An integrated system, consisting of airborne sensor, receiver and computer with both navigation and aircraft performance databases, which provides performance and area navigation guidance to a display and automatic flight control system (AFCS).
Flight Technical Error (FTE) or Path Steering Error (PSE)
ccuracy with which an aircraft is controlled, as measured by the indicated aircraft position with respect to the indicated command or desired position. It does not account for procedural blunder errors.
FLIP
U.S. Flight Information Publication
Flyby Waypoints
Flyby waypoints are used when an aircraft should begin a turn to the next course prior to reaching the waypoint separating the two route segments. This is known as turn anticipation.
Flyover Waypoints
Flyover waypoints are used when the aircraft must fly over the point prior to starting a turn.
FM
Fix to Manual Termination (path terminator per ARINC
FMC
Flight Management Computer
FMS
Flight Management System
FOV
Field of View
FRT
Fixed Radius Transition
FSDO
Flight Standards District Office
FTE
Flight Technical Error
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