Reference only — not for real-world navigation.
KS71
Edgar G Obie Airport · Chinook
Key Facts
Essential technical summary for MSFS 2020/2024 and X-Plane.
ILS Approach StatusILS DATA NOT IN DATABASE
Field Elevation
2,416 ft / 736 m
Transition Altitude
18,000 ft
Primary Channel
UNIC 122.80 MHz (CTAF/UNICOM)
Live Conversion
inHg
hPa
Runway Summary (Quick-Links)
08/26 · 4,000 ft · AsphaltLIGHTEDFlight Planning
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Welcome to the technical flight briefing for Edgar G Obie Airport (KS71), located in Chinook, United States. As a vital hub for Microsoft Flight Simulator 2024, MSFS 2020, and X-Plane pilots, this facility features 1 active runway with a maximum elevation of 2,416 ft. Please note that this field primarily supports VFR and visual approach procedures.Reference the data below for primary communication channels and detailed runway characteristics. Pilots should observe a Transition Altitude of 18,000 ft verified for this field for altimeter reset procedures.
Full Name
Edgar G Obie Airport
ICAO / IATA
KS71 / —
Municipality
Chinook
Country
Region
US-MT — Montana
GPS Coordinates
Transition Altitude
18,000 ft
Elevation
2,416 ft
Pilot Toolbox
External charts, live tracking and weather reports.
Runway 08 / 26
LIGHTED
Runway Length: 4,000 ft / 1,219 m
Runway Width: 75 ft / 23 m
Surface Type: Asphalt
Heading: 100° / 280°
Runway Width: 75 ft / 23 m
Surface Type: Asphalt
Heading: 100° / 280°
RWY 08 (100°)
No ILS / Visual Only
RWY 26 (280°)
No ILS / Visual Only
UNIC CTAF/UNICOM
122.80 MHz
Base Airport Data: OurAirports (Public Domain)
Instrument Approach Data: AIP 2026 Researched · Cycle: Jan 2026