Navigation & Radio at Great Falls International Airport
US
GTF
/
KGTF
Radio Frequencies
14
Navigation Aids
4
Radio Frequencies
A/D
128.600 MHz
APP/DEP
ID: 71461
Ref: 3571
A/D
128.600 MHz
APP/DEP
ID: 71461
Ref: 3571
ATIS
126.600 MHz
ATIS
ID: 71462
Ref: 3571
ATIS
126.600 MHz
ATIS
ID: 71462
Ref: 3571
GND
121.700 MHz
GND/CLNC DEL
ID: 71463
Ref: 3571
GND
121.700 MHz
GND/CLNC DEL
ID: 71463
Ref: 3571
OPS
28.890 MHz
ANG OPS MAINT
ID: 71464
Ref: 3571
OPS
28.890 MHz
ANG OPS MAINT
ID: 71464
Ref: 3571
RDO
122.600 MHz
RDO
ID: 71465
Ref: 3571
RDO
122.600 MHz
RDO
ID: 71465
Ref: 3571
TWR
118.700 MHz
TWR
ID: 71466
Ref: 3571
TWR
118.700 MHz
TWR
ID: 71466
Ref: 3571
UNIC
122.950 MHz
UNICOM
ID: 71467
Ref: 3571
UNIC
122.950 MHz
UNICOM
ID: 71467
Ref: 3571
Navigation Aids
GTF
VORTAC
115.100 MHz
Great Falls
Location
Latitude:
47.450001°
Longitude:
-111.412003°
Elevation:
3673 ft
Additional Info
Usage:
BOTH
Power:
HIGH
Mag Var:
14.038°
DME Information
Channel:
098X
Frequency:
115.100 MHz
ID: 88612
GTF
VORTAC
115.100 MHz
Great Falls
Location
Latitude:
47.450001°
Longitude:
-111.412003°
Elevation:
3673 ft
Additional Info
Usage:
BOTH
Power:
HIGH
Mag Var:
14.038°
DME Information
Channel:
098X
Frequency:
115.100 MHz
ID: 88612
ITU
NDB
0.371 MHz
Truly
Location
Latitude:
47.365898°
Longitude:
-111.373001°
Elevation:
4201 ft
Additional Info
Usage:
TERMINAL
Power:
MEDIUM
Mag Var:
14.015°
ID: 89372
ITU
NDB
0.371 MHz
Truly
Location
Latitude:
47.365898°
Longitude:
-111.373001°
Elevation:
4201 ft
Additional Info
Usage:
TERMINAL
Power:
MEDIUM
Mag Var:
14.015°
ID: 89372
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