Reference only — not for real-world navigation.
KMER
Castle Airport · Merced
Key Facts
Essential technical summary for MSFS 2020/2024 and X-Plane.
ILS Approach StatusILS FREQUENCIES VERIFIED ✅
Field Elevation
191 ft / 58 m
Transition Altitude
18,000 ft
Primary Channel
A/D 120.95 MHz (NORCAL APP/DEP)
Live Conversion
inHg
hPa
Runway Summary (Quick-Links)
13/31 · 11,802 ft · PEMLIGHTEDFlight Planning
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Welcome to the technical flight briefing for Castle Airport (KMER), located in Merced, 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 191 ft. Instrument approaches (IFR) are supported with verified ILS frequencies and identifiers for precision landings.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
Castle Airport
ICAO / IATA
KMER / MER
Municipality
Merced
Country
Region
US-CA — California
GPS Coordinates
Transition Altitude
18,000 ft
Elevation
191 ft
Wikipedia
Pilot Toolbox
External charts, live tracking and weather reports.
Runway 13 / 31
ILS EQUIPPEDLIGHTED
Runway Length: 11,802 ft / 3,597 m
Runway Width: 150 ft / 46 m
Surface Type: PEM
Heading: 141° / 321°
Runway Width: 150 ft / 46 m
Surface Type: PEM
Heading: 141° / 321°
RWY 13 (141°)
No ILS / Visual Only
RWY 31 (321°)
109.50 MHz
IDENT: MER | CRS: 306°
A/D NORCAL APP/DEP
120.95 MHz
AWOS AWO 3
124.47 MHz
UNIC CTAF/UNICOM
123.08 MHz
Base Airport Data: OurAirports (Public Domain)
Instrument Approach Data: FAA NASR · Cycle: Jan 2026