Removed as working from a Piper Mirage for glass avionics upgrade.

Highest quality and most common Compass System (HSI) is the Bendix/King KCS-55A. This is a four part system, consisting of:

• KI-525A Pictorial Navigation Indicator
• KG-102A Directional Gyro 
• KRG-331 Rate Gyro
• KA-51A / KA-51B Slaving Accessory
• Also includes mounting tray and vibration dampers

The KI-525A is the most visible component, and what people tend to mean when they talk about an HSI. This indicator shows both your heading and course information on the same display. It may be interfaced with an Autopilot or Flight Director. It also has dual Glideslope indications that appear when flying a precision (ILS or WAAS GPS) approach.

The course information displayed on the KI-525A may come from a variety of sources, including a GPS. The following NAV Receiver / RNAV Navigation Systems are also compatible with the KI-525A:

• Garmin GNS-430
• Garmin GNS-430W WAAS GPS
• Garmin GNS-530
• Garmin GNS-530W WAAS GPS
• Garmin GNS-480 / CNX-80 WAAS GPS
• Garmin GTN-650 WAAS GPS
• Garmin GTN-750 WAAS GPS
• KX-165 NAV/COMM - 14V or 28V
• KX-165A NAV/COMM
• KX-155 NAV/COMM (with an external VOR/LOC Converter) - 14V or 28V
• SL-30 NAV/COMM
• KNS-80 NAV/RNAV/DME/Glideslope
• KNS-81 NAV/RNAV/Glideslope
• VIR-351 NAV
• and more...