Trig TT21 Operating Manual

Chosen by pilots around the world our compact transponders are the best choice for good reason.

Fitting in the tightest panel space our innovative design saves weight and space. Trig is ‘better by design’ our Mode S technology  makes you visible to commercial, military and GA traffic, as a result transiting busy airspace becomes more predictable and stress free. Our transponders are future proof too – the growing use of ADS-B further enhances your visibility and flight safety. Unlike other brands Trig transponders meet the very latest certification standard for ADS-B, FAA TSO-C166b.

Designed to be easier to use, with a clear bright display the controller even comes with a built in altitude encoder!  Join other pilots who have made Trig their compact transponder of choice – you’ll be in great company.