Radar altimeter (RADALT).
Measures height above terrain. The altitude is monitored to provide a low altitude warning during TF operations and landing operations.
RADAR ALTIMETER-
(See RADIO ALTIMETER.)
RADAR APPROACH- An instrument approach procedure which utilizes Precision Approach Radar (PAR) or Airport Surveillance Radar (ASR).
Radar Altimeter - a small radar mounted on the underside of an aircraft that constantly measures the altitude above ground ...
Radio or radar altimeter. An electronic altimeter that determines the height of an aircraft above the terrain by measuring the time needed for a pulse of radio-frequency energy to travel from the aircraft to the ground and return.
The system uses a radar altimeter (a device used to measure the altitude of the aircraft) to find the aircraft's elevation.
To ignore varying terrain elevations, all navigational altitudes and barometric altimeters are based on height above mean sea level. Only radar altimeters, which measure the distance between the aircraft and the ground at low altitudes, ...
You can see in this picture that this aircraft has a much bigger instrument panel than a VFR JetRanger. This aircraft is equipped about as well as they come: dual attitude indicators, HSI, RMI, 3 axis autopilot, radar altimeter, DME, ...
of parts of an aircraft that will eventually be in bad condition or simply become obsolete that will need to be replaced during the life span of the aircraft. Some of these aircraft parts include audio panels, autopilots, HF radios, radar altimeters, ...
If your wish list were unlimited (which it isn't), it would probably include electric trim, an HSI, an RMI, a remote ID button, an altitude preselect and alerter on the autopilot, a radar altimeter, and a host of others.
 See also: Radar, Altimeter, Flight, Aircraft, Pilot
  
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