S-TEC System 20 Features:

Lighted 3" Turn Coordinator / Roll Axis Computer
---Turn Command in "ST" Stabilizer Mode
---Heading Preselect & Hold
   (Heading System is Optional)
---Low and High Gain VOR/LOC/GPS Tracking

AVAILABLE OPTIONS
---Control Wheel Mode Selection
---DG or HSI
---Manual Electric Trim

S-TEC System 30 Features:

---Lighted 3" Turn Coordinator / Roll Axis Computer
---Remote Pitch Axis Computer
---Turn Command in "ST" Stabilizer Mode
---Heading Preselect and Hold
   (Heading System is Optional)
---Altitude Hold with Remote Engage / Disengage
---Low and High Gain VOR/LOC/GPS Tracking
---Pitch Trim Annunciation

AVAILABLE OPTIONS
---Control Wheel Mode Selection
---DG or HSI
---Manual Electric Trim

S-TEC GPSS Converter Features:

ST-901 GPSS Roll Steering Converter
---Available to convert all S-TEC autopilots without integral GPSS to GPSS Steering
---Converts the heading channel of the autopilot to the GPSS channel for roll steering capability.

REQUIRES GPS NAVIGATOR THAT OUTPUTS GPS ROLL STEERING SIGNALS.

S-TEC System 50 Features:

---Lighted 3" Turn Coordinator
---3 ATI Panel Mounted
---Turn Command in "STB" Stabilizer Mode
---Heading Preselect and Hold
   (Heading System IS Optional)
---Altitude Hold
---VOR/LOC/REV/GPS Tracking
---Pitch Trim Annunciation
---Automatic Self Test

AVAILABLE OPTIONS
---Control Wheel Altitude Engage / Disengage
---DG or HSI
---Manual Electric Trim

S-TEC System 55X Features:

AVAILABLE OPTIONS
---Remote Mode Annunciator
---Flight Director (Requires Remote Annunciator)
---DG or HSI
---Automatic Electric Pitch Trim
---Altitude Selector/Alerter

S-TEC System 60 Features:

---Lighted 3" Turn Coordinator
---3 ATI Panel Mounted Programmer
---Remote Roll and Pitch Computers
---Heading Preselect and Hold
   (Heading system is optional)
---Altitude Hold with Altitude Trim
---Course Intercept Capability
   NAV Mode
   Dual Mode - HDG/NAV
---VOR/LOC/GS/REV/GPS Coupling with 3 Gain Levels
---VOR/LOC/GS/REV/GPS Course Deviation and
   NAV Flag Warning
---Vertical Speed Command
---Pitch Trim Annunciation

AVAILABLE OPTIONS
---Flight Director
---DG or HSI
---Automatic Electric Pitch Trim
---Altitude Selector/Alerter