FLARM
FLARM (short for FLight Alarm) is a collision avoidance instrument designed to assist in the "See-and-Avoid"-Practice used during VFR flights. Originally being designed for gliders, it is now often used in light aircraft, especially when often operating in areas where there is a lot of glider activity.
Working principle
A small computer predicts the future flightpath of the aircraft it is installed in based on GPS data. This predicted flightpath is then transmitted regularly using radio signals similar to the ones used for example for garage remote controls. These signals are received by other FLARM devices (inside a range of typically 3-5 km.[1] If a collision risk is calculated, there is a warning emitted.[2]
Displays
Earlier FLARM devices ("Classic FLARM") had a simple 16-led vertical and horizontal display that showed a broad direction to look for the traffic. Today, FLARM devices are only core modules and can be combined with a variety of displays. FLARM signals can also be included for example on soaring computers like the LX8000/9000.[3][4]
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References
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