[Milsurplus] Landing Indicator?

[William Donzelli]

> That's a real good description of the ZA.  The land-based portion was
> called the YB.  The commercial name for this system was the
> "Air-Track" system, and if you search the web for that and ZA, YB, and
> ILS you'll likely find a bit more info and history.

The transmitter of the system is YD. Details of YB and YC are
sketchy. There may have been a heirarchy of systems.

William Donzelli
aw288 at osfn.org