ELIP · Emergency-Landing Coverage
Safety-Case Report
O'Hare – Downtown Chicago
O'Hare International → Downtown Chicago · 25 km · 1500 ft max · PROPOSED
Route Coverage
74.4%
Generated 2026-09-24
1 Coverage Verdict13.66 nm route
Route within reach of a viable landing site74.4%
Landing desert (no site in reach)3.49 nm
Longest continuous desert1.75 nm
Viable diversion nodes serving the route11
Urgency-band breakdown (FAA emergency taxonomy)
Land Immediately0.74 nm · 5.4%
Land ASAP3.45 nm · 25.3%
Land As Practical5.97 nm · 43.7%
Landing Desert3.49 nm · 25.5%
2 Landing Deserts2 gaps
Stretches where no viable landing site is within reach. The FAA safety case for emergency-landing provision must address each.
From 0 nm → 1.748 nm along route1.748 nm · nearest site 3.078 nm
From 6.243 nm → 7.988 nm along route1.745 nm · nearest site 3.05 nm
3 Diversion Nodes7 viable sites
SiteSource · Risk tier · Weather · Off-route
Saint Mary Of Nazareth HospitalFAA-registeredELEVATEDwx ELEVATED0.208 nm
Chicago Police MarineFAA-registeredMODERATEwx ELEVATED0.872 nm
Lurie Childrens HospitalFAA-registeredMODERATEwx ELEVATED0.93 nm
John H Stroger Hospital Of Cook CountyFAA-registeredMODERATEwx ELEVATED1.206 nm
GottliebFAA-registeredELEVATEDwx ELEVATED2.234 nm
Resurrection Medical CenterFAA-registeredELEVATEDwx ELEVATED2.402 nm
Wgn-TvFAA-registeredELEVATEDwx ELEVATED2.921 nm
4 Methodology & Provenance
Coverage methodologyelip-coverage-1.2
Reach modelfixed distance bands
Urgency bandsLand Immediately ≤0.5nm · Land ASAP ≤1.5nm · Land As Practical ≤3nm
Viability cutexcludes RiskIndex CRITICAL + ELIP not-suitable
Weather hazard (per node)climatological · IEM ASOS · nearest station · weather-hazard-v1
Landing inventoryFAA NASR 5010 + reconciled HIFLD pads
Sampled every0.25 nm
Live coverage recordairindex.io/elip/coverage/cor_ord_downtown
Live / unsealed analysis. This report renders the current canonical ELIP coverage from live AirIndex data and is verifiable against the coverage record above and the published methodology. It is not a sealed, provenance-anchored artifact. Coverage is geometry over a reconciled inventory; it does not certify that any individual site is operationally usable for a given aircraft — that requires the site’s RiskIndex assessment and, for the full physical state, a Ground Truth field capture.
AirIndex ELIP · elip-coverage-1.2 · Vertical Data Group · Generated 2026-09-24
Sources: FAA NASR 5010 · CMS / HIFLD hospital registry · FAA OE/AAA · IEM ASOS climatology · AirIndex coordinate-correction + data-integrity layer