The KNI-520 is a King GPS/VOR/LOC/Glideslope Indicator that was originally designed as part of the Gold Crown series for heavier aircraft. However, it also works very well with the Silver Crown avionics more commonly found in General Aviation aircraft. It is functionally equivalent to the KI-206, although it uses a different connector.
Like the KI-206, the KNI-520 uses rectilinear meter movements, instead of pendulum, which makes it easier to read. This is especially nice when flying an ILS, since the needles stay perpendicular to each other. This feature helps the pilot to better determine the degree of correction needed to follow the approach accurately.
This indicator does not contain a VOR/LOC Converter, which permits its use with a GPS. The KNI-520, together with an Annunciator Control Unit (ACU), can be used to meet the FAA requirements for an IFR GPS installation.
The KNI-520 features:
- Gold Crown design
- Metal bezel with glass lens
Since the King KNI-520 does not contain an internal VOR/LOC Converter, it is designed to be used with NAV equipment that does include this converter, such as:
- King KX-165 NAV/COMM - 14V or 28V
- King KX-165A NAV/COMM - 28 V only
- Apollo SL-30 NAV/COMM
- King KNS-80 NAV/RNAV/DME/Glideslope
- King KNS-81 NAV/RNAV/Glideslope
The KNI-520 is an excellent choice to use with a GPS, particularly one that provides precision vertical guidance via ILS and/or WAAS:
- 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