Navigation & Radio at Modesto City Co-Harry Sham Field
US
MOD
/
KMOD
Radio Frequencies
18
Navigation Aids
4
Radio Frequencies
A/D
36.320 MHz
NORCAL APP/DEP
ID: 69773
Ref: 3701
A/D
36.320 MHz
NORCAL APP/DEP
ID: 69773
Ref: 3701
A/D
120.950 MHz
NORCAL APP/DEP
ID: 69772
Ref: 3701
A/D
120.950 MHz
NORCAL APP/DEP
ID: 69772
Ref: 3701
ASOS
127.700 MHz
ASOS
ID: 69774
Ref: 3701
ASOS
127.700 MHz
ASOS
ID: 69774
Ref: 3701
ATIS
127.700 MHz
ATIS
ID: 69775
Ref: 3701
ATIS
127.700 MHz
ATIS
ID: 69775
Ref: 3701
CTAF
125.300 MHz
CTAF
ID: 69776
Ref: 3701
CTAF
125.300 MHz
CTAF
ID: 69776
Ref: 3701
GND
121.700 MHz
GND
ID: 69777
Ref: 3701
GND
121.700 MHz
GND
ID: 69777
Ref: 3701
RDO
114.600 MHz
RANCHO RDO
ID: 69778
Ref: 3701
RDO
114.600 MHz
RANCHO RDO
ID: 69778
Ref: 3701
TWR
125.300 MHz
TWR
ID: 69779
Ref: 3701
TWR
125.300 MHz
TWR
ID: 69779
Ref: 3701
UNIC
122.950 MHz
UNICOM
ID: 69780
Ref: 3701
UNIC
122.950 MHz
UNICOM
ID: 69780
Ref: 3701
Navigation Aids
MO
NDB
0.367 MHz
Wowar
Location
Latitude:
37.573101°
Longitude:
-120.855003°
Elevation:
115 ft
Additional Info
Usage:
TERMINAL
Power:
LOW
Mag Var:
14.270°
ID: 91152
MO
NDB
0.367 MHz
Wowar
Location
Latitude:
37.573101°
Longitude:
-120.855003°
Elevation:
115 ft
Additional Info
Usage:
TERMINAL
Power:
LOW
Mag Var:
14.270°
ID: 91152
MOD
VOR-DME
114.600 MHz
Modesto
Location
Latitude:
37.627300°
Longitude:
-120.958000°
Elevation:
90 ft
Additional Info
Usage:
BOTH
Power:
HIGH
Mag Var:
14.289°
DME Information
Channel:
093X
Frequency:
114.600 MHz
ID: 91156
MOD
VOR-DME
114.600 MHz
Modesto
Location
Latitude:
37.627300°
Longitude:
-120.958000°
Elevation:
90 ft
Additional Info
Usage:
BOTH
Power:
HIGH
Mag Var:
14.289°
DME Information
Channel:
093X
Frequency:
114.600 MHz
ID: 91156
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