Reference only — not for real-world navigation.
23IS
Clark Airport · Plymouth
Key Facts
Essential technical summary for MSFS 2020/2024 and X-Plane.
ILS Approach StatusILS DATA NOT IN DATABASE
Field Elevation
570 ft / 174 m
Transition Altitude
18,000 ft
Primary Channel
—
Live Conversion
inHg
hPa
Runway Summary (Quick-Links)
E/W · 1,600 ft · TurfUNLITFlight Planning
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Welcome to the technical flight briefing for Clark Airport (23IS), located in Plymouth, 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 570 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
Clark Airport
ICAO / IATA
23IS / —
Municipality
Plymouth
Country
Region
US-IL — Illinois
GPS Coordinates
Transition Altitude
18,000 ft
Elevation
570 ft
Pilot Toolbox
External charts, live tracking and weather reports.
Runway E / W
UNLIT
Runway Length: 1,600 ft / 488 m
Runway Width: 70 ft / 21 m
Surface Type: Turf
Heading: —° / —°
Runway Width: 70 ft / 21 m
Surface Type: Turf
Heading: —° / —°
RWY E
No ILS / Visual Only
RWY W
No ILS / Visual Only
No frequency data available.
Base Airport Data: OurAirports (Public Domain)
Instrument Approach Data: AIP 2026 Researched · Cycle: Jan 2026