Navigation & Radio at Spirit of St Louis Airport
US
SUS
/
KSUS
Radio Frequencies
9
Navigation Aids
6
Radio Frequencies
A/D
126.500 MHz
ST LOUIS APP/DEP
ID: 68365
Ref: 3907
AAS
124.750 MHz
ADVSY SVC
ID: 68366
Ref: 3907
ATIS
134.800 MHz
ATIS
ID: 68367
Ref: 3907
CLD
121.700 MHz
CLNC DEL
ID: 68368
Ref: 3907
CTAF
124.750 MHz
CTAF
ID: 68369
Ref: 3907
GND
121.700 MHz
GND
ID: 68370
Ref: 3907
RDO
122.200 MHz
ST LOUIS RDO
ID: 68371
Ref: 3907
TWR
122.600 MHz
TWR
ID: 68372
Ref: 3907
UNIC
122.950 MHz
UNICOM
ID: 68373
Ref: 3907
Navigation Aids
FTZ
VORTAC
110.800 MHz
Foristell
Location
Latitude:
38.694500°
Longitude:
-90.971298°
Elevation:
817 ft
Additional Info
Usage:
LO
Power:
MEDIUM
Mag Var:
0.115°
DME Information
Channel:
045X
Frequency:
110.800 MHz
ID: 88184
FTZ
VORTAC
110.800 MHz
Foristell
Location
Latitude:
38.694500°
Longitude:
-90.971298°
Elevation:
817 ft
Additional Info
Usage:
LO
Power:
MEDIUM
Mag Var:
0.115°
DME Information
Channel:
045X
Frequency:
110.800 MHz
ID: 88184
FZ
NDB
0.227 MHz
Eaves
Location
Latitude:
38.676998°
Longitude:
-90.547600°
Elevation:
N/A ft
Additional Info
Usage:
TERMINAL
Power:
LOW
Mag Var:
-0.085°
ID: 88223
FZ
NDB
0.227 MHz
Eaves
Location
Latitude:
38.676998°
Longitude:
-90.547600°
Elevation:
N/A ft
Additional Info
Usage:
TERMINAL
Power:
LOW
Mag Var:
-0.085°
ID: 88223
SU
NDB
0.326 MHz
Snoop
Location
Latitude:
38.639301°
Longitude:
-90.767097°
Elevation:
N/A ft
Additional Info
Usage:
TERMINAL
Power:
LOW
Mag Var:
0.022°
ID: 94030
SU
NDB
0.326 MHz
Snoop
Location
Latitude:
38.639301°
Longitude:
-90.767097°
Elevation:
N/A ft
Additional Info
Usage:
TERMINAL
Power:
LOW
Mag Var:
0.022°
ID: 94030
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