Ground Navigation Aids, ILS & Navaid Structures

The ground-based radio guidance that brings aircraft to the runway and the physical structures that carry it: Instrument Landing Systems (ILS — localizer and glide path), VOR/DME and other en-route and approach navaids, plus the frangible masts, approach-light masts, localizer and glide-path support towers engineered to break safely on impact per ICAO Annex 14. It also covers airborne flight inspection — the calibration flights and onboard systems that certify navaid signal accuracy. Buyers are ANSPs, civil aviation authorities, airport operators and airfield civil contractors. Procurement ties tightly to runway and approach projects and to ICAO Annex 10/14 frangibility and signal-tolerance requirements.