UNSPSC 25173115: Instrument Landing System (ILS)

In aviation, the instrument landing system (ILS) is a radio navigation system that provides short-range guidance to aircraft to allow them to approach a runway at night or in bad weather. In its original form, it allows an aircraft to approach until it is 200 feet (61 m) over the ground, within a 1?2 mile of the runway. At that point the runway should be visible to the pilot; if it is not, they perform a missed approach. Bringing the aircraft this close to the runway dramatically improves the weather conditions in which a safe landing can be made.

Later versions of the system, or "categories", have further reduced the minimum altitudes.

UNSPSC 25173115 Instrument Landing System (ILS) is a Commodity code with little relevant recent state and local procurement activity. The recent opportunities tagged under this code show substantial mismatch between the code's nominal scope—airport navigation and precision-approach equipment—and the work actually being solicited. The source record identifies one opportunity loosely related to instrumentation (Pinellas County's forensic drug standards procurement) and multiple water utility, wastewater, and municipal infrastructure solicitations centered on pressure gauges, flow meters, SCADA systems, cyanide analyzers, and atmospheric monitoring equipment. None of these fall within aviation-infrastructure categories or navigation systems. State and local buyers use UNSPSC broadly; many tag multi-category MRO and equipment contracts with single codes that do not precisely reflect the full scope of deliverables.

The issuing bodies in the recent record span cities (Tampa, Phoenix, Arlington, Tucson, Wichita, Santa Monica), counties (Hillsborough, Collier, Pinellas, Sacramento), special-purpose districts (Tucson Water, City of Meriden Water Department), and regional authorities. Most solicitations target water, wastewater, and utility operations—pressure and temperature instrumentation (Phoenix IFB 26-0398, Hillsborough ITB 26-00392 and SS 26-00359), Ashcroft brand gauges (Hillsborough ITB 26-00392 and SS 26-00359), SCADA system upgrades (Gallup, New Mexico RFP 2025202603), flow analyzers (City of Arlington RFP 270014 for cyanide monitoring), and atmospheric hazard detection (Phoenix IFB-27-0435). Geographic activity centers on Florida (Hillsborough County, Collier County, City of Tampa, City of Wichita), Arizona (Phoenix), and New Mexico (Gallup), with scattered activity in Connecticut, South Carolina, Texas, and other states. No solicitations specifically reference Instrument Landing Systems, airport terminal navigation infrastructure, or civil aviation equipment. The code shows minimal pursuit opportunity in this market segment based on available posting activity.