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An altimeter or an altitude meter is an instrument used to measure the altitude of an object above a fixed level. [1] The measurement of altitude is called altimetry , which is related to the term bathymetry , the measurement of depth under water.
The greater the altitude, the lower the pressure. When a barometer is supplied with a nonlinear calibration so as to indicate altitude, the instrument is a type of altimeter called a pressure altimeter or barometric altimeter. A pressure altimeter is the altimeter found in most aircraft, and skydivers use wrist-mounted versions for similar ...
Inertial navigation is a self-contained navigation technique in which measurements provided by accelerometers and gyroscopes are used to track the position and orientation of an object relative to a known starting point, orientation and velocity.
Revathi 3D Naval Medium range surveillance radar derived from the 3D CAR ... Blighter B202 Mk 2 - Man-portable ... AN/APN-141 Low altitude radar altimeter ...
1995: Oldsmobile introduced the first GPS navigation system available in a United States production car, called GuideStar. [20] The navigation system was developed in cooperation with Zexel. Zexel partnered with Avis Car Rental to make the system widely available in rental cars. This provided many in the United States general public with their ...
To help avoid controlled flight into terrain , aircraft use systems such as ground-proximity warning systems (GPWS), which use radar altimeters as a key element. One of the major weaknesses of GPWS is the lack of "look-ahead" information, because it only provides altitude above terrain "look-down".
StreetPilot was Garmin’s first portable navigation system for cars. [16] [18] Founders Gary Burrell and Min Kao. By 1999, sales had reached $232.6 million [14] with a profit of $64 million. Garmin reported a 2006 total revenue of $1.77 billion, up 73% from $1.03 billion in 2005. [19] [20] [14] Garmin headquarters in Olathe, Kansas since 1996
Portable radio, HF 100W AM/CW/USB/RTTY, powered by AC supply, battery or generator, transported in two boxes including all accessories for operation: AN/PRC-49: Survival radio: AN/PRC-63: Survival radio: AN/PRC-65: Portable transceiver, Ultra high frequency (UHF)-band, 1,120 channels, 100-156 mc, 6 lbs: Simmonds Precision Products AN/PRC-66