can be installed at any tower, wire crossing, or other obstacle, and
receives transponder transmissions, determines if an aircraft is likely to
hit the obstacle, and transmits a warning on all VHF frequencies.

That sounds like a stupid system. Just what we want! (add sarcasm) A bunch
of warnings that go off on all our comm's so often that we are both annoyed
by them and desensitized by them.

Buy a GPS with terrain and obstacle warning. Then someone's buzzing, low
approach, landing, corridor flying or stupidity won't annoy everyone in a
ten mile radius.

Kobra