Navigation & Radio at Sierra Vista Municipal Airport / Libby Army Air Field
US
FHU
/
KFHU
Radio Frequencies
16
Navigation Aids
6
Radio Frequencies
ASOS
119.675 MHz
ASOS
ID: 63836
Ref: 3529
ASOS
119.675 MHz
ASOS
ID: 63836
Ref: 3529
ATIS
134.750 MHz
ATIS
ID: 63837
Ref: 3529
ATIS
134.750 MHz
ATIS
ID: 63837
Ref: 3529
CTAF
124.950 MHz
CTAF
ID: 63838
Ref: 3529
CTAF
124.950 MHz
CTAF
ID: 63838
Ref: 3529
GCA
127.050 MHz
LIBBY GCA
ID: 63839
Ref: 3529
GCA
127.050 MHz
LIBBY GCA
ID: 63839
Ref: 3529
GND
121.700 MHz
GND
ID: 63840
Ref: 3529
GND
121.700 MHz
GND
ID: 63840
Ref: 3529
OPS
122.950 MHz
LIBBY OPS
ID: 63841
Ref: 3529
OPS
122.950 MHz
LIBBY OPS
ID: 63841
Ref: 3529
TWR
124.950 MHz
LIBBY TWR
ID: 63842
Ref: 3529
TWR
124.950 MHz
LIBBY TWR
ID: 63842
Ref: 3529
UNIC
122.950 MHz
UNICOM
ID: 63843
Ref: 3529
UNIC
122.950 MHz
UNICOM
ID: 63843
Ref: 3529
Navigation Aids
ARH
TACAN
111.600 MHz
Libby
Location
Latitude:
31.585600°
Longitude:
-110.338997°
Elevation:
4659 ft
Additional Info
Usage:
BOTH
Power:
LOW
Mag Var:
10.418°
DME Information
Channel:
053X
Frequency:
111.600 MHz
ID: 85584
ARH
TACAN
111.600 MHz
Libby
Location
Latitude:
31.585600°
Longitude:
-110.338997°
Elevation:
4659 ft
Additional Info
Usage:
BOTH
Power:
LOW
Mag Var:
10.418°
DME Information
Channel:
053X
Frequency:
111.600 MHz
ID: 85584
DAO
NDB
0.410 MHz
Dragoo
Location
Latitude:
31.585699°
Longitude:
-110.344002°
Elevation:
4654 ft
Additional Info
Usage:
TERMINAL
Power:
LOW
Mag Var:
10.419°
ID: 87271
DAO
NDB
0.410 MHz
Dragoo
Location
Latitude:
31.585699°
Longitude:
-110.344002°
Elevation:
4654 ft
Additional Info
Usage:
TERMINAL
Power:
LOW
Mag Var:
10.419°
ID: 87271
FHU
VOR
113.600 MHz
Sierra Vista Muni/Libby Aaf
Location
Latitude:
31.589701°
Longitude:
-110.355003°
Elevation:
4664 ft
Additional Info
Usage:
TERMINAL
Power:
LOW
Mag Var:
10.421°
ID: 87996
FHU
VOR
113.600 MHz
Sierra Vista Muni/Libby Aaf
Location
Latitude:
31.589701°
Longitude:
-110.355003°
Elevation:
4664 ft
Additional Info
Usage:
TERMINAL
Power:
LOW
Mag Var:
10.421°
ID: 87996
Understanding Airport Navigation & Radio Communications
Radio Frequencies in Aviation
Radio frequencies are essential for communication between aircraft, air traffic control, and ground services. Here are the common types:
Common Frequency Types
- ATIS (Automatic Terminal Information Service): Continuous broadcast of airport conditions
- Ground: Communication with ground control for taxi instructions
- Tower: Communication with air traffic control tower
- Approach/Departure: Handling arriving and departing aircraft
- UNICOM/CTAF: Used at airports without control towers
Frequency Ranges
- VHF Band: 118.000 - 136.975 MHz
- Emergency: 121.5 MHz (International emergency frequency)
- Ground Control: Usually 121.6 - 121.9 MHz
- ATIS: Usually 108 - 118 MHz
- UNICOM: Typically 122.8 MHz (uncontrolled airports)
Navigation Aids (Navaids)
Navigation aids are electronic systems that help pilots determine their position and navigate safely. Here are the main types:
Types of Navaids
- VOR (VHF Omnidirectional Range): Provides bearing information to aircraft
- DME (Distance Measuring Equipment): Gives slant-range distance to the station
- NDB (Non-Directional Beacon): Simple radio beacon for basic navigation
- TACAN (Tactical Air Navigation): Military version of VOR/DME
- VORTAC: Combined VOR and TACAN facility
Usage Types & Power Levels
- HI: High altitude navigation
- LO: Low altitude navigation
- TERM: Terminal area navigation
- Power Levels: HIGH, MEDIUM, LOW (affects range)
- RNAV: Area navigation capability
Important Notes
- Always verify frequencies and navaid status in current aviation publications
- Magnetic variation changes over time and should be considered when using navaids
- Some navaids may be out of service or have limited hours of operation
- DME distances are slant-range and may differ from actual ground distance