Reference only — not for real-world navigation.
FHAW
RAF Ascension Island · Cat Hill
Key Facts
Essential technical summary for MSFS 2020/2024 and X-Plane.
ILS Approach StatusILS FREQUENCIES VERIFIED ✅
Field Elevation
278 ft / 85 m
Transition Altitude
5,000 ft
Primary Channel
TWR 126.20 MHz (WIDEAWAKE TWR)
Live Conversion
inHg
hPa
Runway Summary (Quick-Links)
13/31 · 10,019 ft · AsphaltLIGHTEDFlight Planning
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Welcome to the technical flight briefing for RAF Ascension Island (FHAW), located in Cat Hill, Saint Helena, Ascension and Tristan da Cunha. 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 278 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 5,000 ft verified for this field for altimeter reset procedures.
Full Name
RAF Ascension Island
ICAO / IATA
FHAW / ASI
Municipality
Cat Hill
Region
SH-AC — Ascension
GPS Coordinates
Transition Altitude
5,000 ft
Elevation
278 ft
Official Website
Wikipedia
Pilot Toolbox
External charts, live tracking and weather reports.
Runway 13 / 31
LIGHTED
Runway Length: 10,019 ft / 3,054 m
Runway Width: 150 ft / 46 m
Surface Type: Asphalt
Heading: 117° / 297°
Runway Width: 150 ft / 46 m
Surface Type: Asphalt
Heading: 117° / 297°
RWY 13 (117°)
No ILS / Visual Only
RWY 31 (297°)
No ILS / Visual Only
A/G RAF HAVENS HF
1124.70 MHz
ACC ATLANTICO FIR
1795.50 MHz
RDO ASCENSION RDO
1078.00 MHz
TWR WIDEAWAKE TWR
126.20 MHz
Base Airport Data: OurAirports (Public Domain)
Instrument Approach Data: AIP 2026 Researched · Cycle: Jan 2026