Navigation & Radio at Gray Army Air Field
US
GRF
/
KGRF
Radio Frequencies
16
Navigation Aids
3
Radio Frequencies
A/D
120.100 MHz
SEATTLE APP/DEP
ID: 61911
Ref: 3563
A/D
120.100 MHz
SEATTLE APP/DEP
ID: 61911
Ref: 3563
ATIS
124.650 MHz
ATIS
ID: 61912
Ref: 3563
ATIS
124.650 MHz
ATIS
ID: 61912
Ref: 3563
CTAF
119.325 MHz
CTAF
ID: 61913
Ref: 3563
CTAF
119.325 MHz
CTAF
ID: 61913
Ref: 3563
GND
121.900 MHz
GND/CLNC DEL
ID: 61914
Ref: 3563
GND
121.900 MHz
GND/CLNC DEL
ID: 61914
Ref: 3563
INFO
36.100 MHz
AR OPS
ID: 61915
Ref: 3563
MISC
36.550 MHz
ARNG OPS
ID: 61916
Ref: 3563
OPS
32.300 MHz
OPS
ID: 61917
Ref: 3563
OPS
32.300 MHz
OPS
ID: 61917
Ref: 3563
PMSV
134.100 MHz
PMSV METRO
ID: 61918
Ref: 3563
RDO
36.700 MHz
BULLSEYE RDO
ID: 61919
Ref: 3563
TWR
119.325 MHz
TWR
ID: 61920
Ref: 3563
TWR
119.325 MHz
TWR
ID: 61920
Ref: 3563
Navigation Aids
GR
NDB
0.216 MHz
Graye
Location
Latitude:
47.150200°
Longitude:
-122.605003°
Elevation:
101 ft
Additional Info
Usage:
LO
Power:
LOW
Mag Var:
17.345°
ID: 88538
GR
NDB
0.216 MHz
Graye
Location
Latitude:
47.150200°
Longitude:
-122.605003°
Elevation:
101 ft
Additional Info
Usage:
LO
Power:
LOW
Mag Var:
17.345°
ID: 88538
LAC
NDB
0.328 MHz
Lacomas
Location
Latitude:
47.007999°
Longitude:
-122.556000°
Elevation:
101 ft
Additional Info
Usage:
LO
Power:
LOW
Mag Var:
17.311°
ID: 90146
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