Sandia altitude encoder, p/n 305154.00, s/n 11035. electrical interface for TCAS function of the Garmin GMX-200, and enabled the terrain function of the Garmin GMX-200 I.A.W. Pro Star Aviation STC SR00264B0 with deviations documented on Pro Star Aviation, DER approved drawing 2649 *GMX 200 MFD MOD WIRING DIAGRAM", Rev. I