The TRIG TX56 is a slimline panel-mounted aviation NAV/COM radio designed for general aviation aircraft, combining VHF communication with VOR/ILS navigation capability in a compact avionics stack unit. It operates on 8.33 kHz channel spacing (compliant with European airspace requirements) and is powered by a wide-range aircraft electrical system.

This model is the lower-power version of the TX57, delivering 10W transmission output and operating on 11–33V DC systems, making it suitable for both 14V and 28V aircraft installations.

Its primary features include:
8.33 kHz digital VHF COM radio (airband compliant)
Integrated NAV receiver with VOR/ILS capability
10W transmitter power output for standard range operations
Wide input voltage range: 11–33V DC
Slim 33 mm stack height for compact panel installation
Dual Watch function for monitoring two frequencies
Built-in digital CDI for navigation display support
Morse code identification for VOR stations
USB programmable frequency database loading
Integrated intercom and audio features
Certified aviation avionics (ETSO/TSO approved)

Compared to the TX57, the TX56 trades higher power for lower consumption and broader 14V compatibility, making it a more flexible option for lighter or mixed-fleet aircraft installations.