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For critical flying operations,
the FreeFlight TRA-3500 (PMA) combined with the TRI-40
indicator, provides pilots with highly accurate above-ground-level
(AGL) information. This real-time system offers an
extra measure of operational safety during landing,
navigation, or hovering. Designed for applications
such as helicopter and seaplane operations where accuracy
is needed down to zero feet, the TRA-3500 provides
precise AGL information from 2500 feet down to ground
level. Stable altitude readout while hovering offers
a significant safety benefit in rotorcraft applications.
The TRA-3500 consists of a remote
unit and dual antennas for greater accuracy and installation
flexibility. A choice of analog outputs facilitates
integration with other on-board equipment such as
flight director systems.
Coupled with the TRA-3500 Radar
Altimeter, the TRI-40 Indicator displays the AGL altitude
and the pilot’s preselected decision height
(DH) in a bright, LED readout. Through audible warnings,
the pilot is alerted when the aircraft descends below
the DH. This panel-mounted display provides essential
information, especially important when there are insufficient
visual cues in the terminal area surrounding an airport
or along a desired low-level flight path.
The TRI-40 Indicator also includes
a visual and audible gear-up warning when the aircraft
is below 100 feet. A trip-point output allows the
pilot to activate additional alerts every 100 feet
up to 800 feet. As an option, a TRI-40 Indicator mounted
in a round faceplate adapter is available to simplify
certain installations.
In addition to the standard version,
a Night Vision Goggle (NVG) compatible display is
available.
TRA-3500
Radar Altimeter Data Sheet and Specifications*
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