Navigation & Radio at St Louis Regional Airport
US
ALN
/
KALN
Radio Frequencies
18
Navigation Aids
4
Radio Frequencies
A/D
124.200 MHz
APP/DEP
ID: 67345
Ref: 3374
A/D
124.200 MHz
APP/DEP
ID: 67345
Ref: 3374
ATIS
128.000 MHz
ATIS
ID: 67346
Ref: 3374
ATIS
128.000 MHz
ATIS
ID: 67346
Ref: 3374
AWOS
128.000 MHz
AWOS 3
ID: 67347
Ref: 3374
AWOS
128.000 MHz
AWOS 3
ID: 67347
Ref: 3374
CLD
120.200 MHz
CLNC DEL
ID: 67348
Ref: 3374
CLD
120.200 MHz
CLNC DEL
ID: 67348
Ref: 3374
CTAF
126.000 MHz
CTAF
ID: 67349
Ref: 3374
CTAF
126.000 MHz
CTAF
ID: 67349
Ref: 3374
GND
120.200 MHz
GND
ID: 67350
Ref: 3374
GND
120.200 MHz
GND
ID: 67350
Ref: 3374
RDO
122.050 MHz
RDO
ID: 67351
Ref: 3374
RDO
122.050 MHz
RDO
ID: 67351
Ref: 3374
TWR
126.000 MHz
REGIONAL TWR
ID: 67352
Ref: 3374
TWR
126.000 MHz
REGIONAL TWR
ID: 67352
Ref: 3374
UNIC
122.950 MHz
UNICOM
ID: 67353
Ref: 3374
UNIC
122.950 MHz
UNICOM
ID: 67353
Ref: 3374
Navigation Aids
AL
NDB
0.218 MHz
Alpos
Location
Latitude:
38.855099°
Longitude:
-89.938202°
Elevation:
N/A ft
Additional Info
Usage:
TERMINAL
Power:
LOW
Mag Var:
-0.391°
ID: 85392
AL
NDB
0.218 MHz
Alpos
Location
Latitude:
38.855099°
Longitude:
-89.938202°
Elevation:
N/A ft
Additional Info
Usage:
TERMINAL
Power:
LOW
Mag Var:
-0.391°
ID: 85392
CVM
NDB
0.263 MHz
Civic Mem
Location
Latitude:
38.892300°
Longitude:
-90.056297°
Elevation:
545 ft
Additional Info
Usage:
TERMINAL
Power:
LOW
Mag Var:
-0.338°
ID: 87148
TOY
VORTAC
116.000 MHz
Troy
Location
Latitude:
38.739201°
Longitude:
-89.918602°
Elevation:
570 ft
Additional Info
Usage:
LO
Power:
MEDIUM
Mag Var:
-0.390°
DME Information
Channel:
107X
Frequency:
116.000 MHz
ID: 94527
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