NDB approaches.....>>>
http://stoenworks.com/Tutorials/IFR,%20 ... aches.html..all sounds rather complicated!...

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San Francisco (KSFO) has a NDB installed as its Outer Marker on its Glide Path to runway 26R.
Its also equipped with a full Nav ILS landing system.
Funny thing is, I just dial up the KSFO NDB as a useful guide to the direction of the Glide Path, rather than for landing purposes!
I find NDB's useful or homing onto a location on the Map.
My local Airfield (EGBS) is equipped with a NDB right beside the Tower, and always guides me back home!...

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It would be a great pity to see them all disappear!
Paul...NDB's, Dials, and little yellow needles, are very comforting!...

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Win 8.1 64-bit. DX11. Advent Tower. Intel i7-3770 3.9 GHz 8-core. 8 GB System RAM. AMD Radeon HD 7700 1GB RAM. DVD ROM. 2 Terra Byte SATA Hard Drive. Philips 17" LCD Monitor. Saitek Cyborg X Fly-5 Joystick. ...and a Briggs and Stratton Petrol Lawn Mower.