Trt
Named as the FAA publishes it on its approvals.
Approved to make 1 class of equipment. FAA spelling: TRT.
Equipment approvals technical standard order authorisations
TSO-C66B · Airborne Distance Measuring Equipment (Dme) Operating Within Radio Frequency Range Of... · * · instruments and avionics
Source: FAA Dynamic Regulatory System (type certificate data sheets, supplemental type certificates, parts manufacturer approvals, technical standard order authorisations). An organisation's name is as the FAA spelled it on each record; related spellings are separate pages.