uses pitot-static pressure to indicate altitude above sea level
Radar Altimeter
uses radio echoes to determine altitude above ground level.
Azimuth
is defined as the angular position or bearing in a horizontal plane usually measured clockwise from true north
Bearing
is defined as angular position of an object with respect to a reference point or line
Range
is defined as actual orientation of the aircrafts longitudinal axis at any instance
True Heading
is the direction of true north
Magnetic Heading
uses the direction of the earths magnetic field at that location as the reference
Relative Heading
uses the current direction that an object is facing at the 0/360 azimuth alignment
acronym for VHF
Very-High Frequency
acronym for UHF
Ultra-High Frequency
Purpose of VHF/UHF
To communicate with other aircraft, ground stations, shipping traffic and coastal stations
acronym for AJ
Anti-Jam Radio
acronym for IAS
Intercommunication Audio System
Purpose of IAS
to provide amplification and routing of audio signals between cockpit, ground crew and rear cockpit
acronym for TACAN
Tactical Air Navigation
Purpose of TACAN
is to determine the relative bearing and slant range distance to a TACAN ground station or a similar TACAN equipped aircraft
acronym for GPS
Global Positioning System
Purpose of GPS
a navigation system that receives reference information from a satellite source
acronym for ARI
Altitude Reference Indicator
Purpose of ARI
a self-contained pitch and roll ARI with an electrically driven gyro maintains vertical orientation through use of an electronic erection system
acronym for ILS
Instrument Landing System
purpose of ILS
an all weather approach guidance system that provides steering information during an aircraft approach by decoding azimuth and elevation microwave signals received from surface transmitters
Pitot Static System
measures temperature, and pitot and static pressures surrounding the aircraft
acronym for AFCS
Automatic Flight Control System
purpose of AFCS
to provide autopilot and automatic throttle control
acronym for ATC
Automatic Throttle Control
Airspeed Indicator
displays airspeed as a function of pitot and static pressure.