Navigation & Radio at Purdue University Airport
US
LAF
/
KLAF
Radio Frequencies
16
Navigation Aids
3
Radio Frequencies
A/D
123.850 MHz
GRISSOM A/D
ID: 509914
Ref: 3627
A/D
123.850 MHz
GRISSOM A/D
ID: 509914
Ref: 3627
ATIS
127.750 MHz
ATIS
ID: 68769
Ref: 3627
ATIS
127.750 MHz
ATIS
ID: 68769
Ref: 3627
CNTR
123.850 MHz
CHICAGO CNTR
ID: 68770
Ref: 3627
CNTR
123.850 MHz
CHICAGO CNTR
ID: 68770
Ref: 3627
CTAF
119.600 MHz
CTAF
ID: 68771
Ref: 3627
CTAF
119.600 MHz
CTAF
ID: 68771
Ref: 3627
GND
121.900 MHz
GND
ID: 68772
Ref: 3627
GND
121.900 MHz
GND
ID: 68772
Ref: 3627
RDO
122.200 MHz
TERRE HAUTE RDO
ID: 68773
Ref: 3627
RDO
122.200 MHz
TERRE HAUTE RDO
ID: 68773
Ref: 3627
TWR
119.600 MHz
LAFAYETTE TWR
ID: 68774
Ref: 3627
TWR
119.600 MHz
LAFAYETTE TWR
ID: 68774
Ref: 3627
UNIC
122.950 MHz
UNICOM
ID: 68775
Ref: 3627
UNIC
122.950 MHz
UNICOM
ID: 68775
Ref: 3627
Navigation Aids
BVT
VORTAC
115.100 MHz
Boiler
Location
Latitude:
40.556099°
Longitude:
-87.069298°
Elevation:
750 ft
Additional Info
Usage:
BOTH
Power:
HIGH
Mag Var:
-3.185°
DME Information
Channel:
098X
Frequency:
115.100 MHz
ID: 86472
BVT
VORTAC
115.100 MHz
Boiler
Location
Latitude:
40.556099°
Longitude:
-87.069298°
Elevation:
750 ft
Additional Info
Usage:
BOTH
Power:
HIGH
Mag Var:
-3.185°
DME Information
Channel:
098X
Frequency:
115.100 MHz
ID: 86472
LA
NDB
0.401 MHz
Earle
Location
Latitude:
40.426498°
Longitude:
-87.051804°
Elevation:
670 ft
Additional Info
Usage:
TERMINAL
Power:
LOW
Mag Var:
-3.177°
ID: 90139
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