Trio

GPSS (GPS Steering): This option might be desired if your GPS receiver or EFIS system provides GPSS commands, usually via an ARINC 429 data output. In this case, the Pro Pilot will no longer rely upon its own navigation functions, but will follow the roll commands coming from the GPS or EFIS for guidance.

(Note: If you will be using a handheld GPS to provide signals to the autopilot, it does not have ARINC 429 outputs available).

GPSV (GPS Vertical Steering): With WAAS approaches coming into widespread use, it is now possible to do precision approaches using approved GPS systems. The GPSV option allows the Pro Pilot to follow the pitch steering commands that are provided by an approved panel mounted WAAS GPS receiver or EFIS system for descents into an airport. The GPSV option requires that the GPSS option is also installed.

The GPSV feature also allows the autopilot to follow the vertical bug on a compatible EFIS system.

Note: Trio has combined the GPSS and GPSV functions to interface with the increased number of EFIS systems and approach certified receivers. We now offer only the combined GPSS/GPSV option.