ILS 400: Instrument Landing System
Val Avionics FIRST all in one flight system.
The ILS 400 was the first completely self contained digital landing system on the market. It included both a Localizer and Glide Slope all in one package. Both receivers were controlled by digital synthesis to prevent drift which was common in other Analog units of the time.
With an integrated three light marker, the ILS 400 was a complete landing solution.
No Longer Available
See the INS 429