Navigation & Radio at Portland International Airport
US
PDX
/
KPDX
Radio Frequencies
20
Navigation Aids
4
Radio Frequencies
ACP
124.350 MHz
939 ARW COMD POST
ID: 67285
Ref: 3768
ACP
124.350 MHz
939 ARW COMD POST
ID: 67285
Ref: 3768
APP
29.920 MHz
APP
ID: 67287
Ref: 3768
APP
29.920 MHz
APP
ID: 67287
Ref: 3768
APP
118.100 MHz
APP
ID: 67286
Ref: 3768
APP
118.100 MHz
APP
ID: 67286
Ref: 3768
ATIS
120.625 MHz
ATIS
ID: 67288
Ref: 3768
ATIS
120.625 MHz
ATIS
ID: 67288
Ref: 3768
CLD
120.125 MHz
CLNC DEL
ID: 67289
Ref: 3768
CLD
120.125 MHz
CLNC DEL
ID: 67289
Ref: 3768
DEP
118.100 MHz
DEP
ID: 67290
Ref: 3768
DEP
118.100 MHz
DEP
ID: 67290
Ref: 3768
GND
121.900 MHz
GND
ID: 67291
Ref: 3768
GND
121.900 MHz
GND
ID: 67291
Ref: 3768
OPS
28.050 MHz
ANG BASE OPS
ID: 67292
Ref: 3768
OPS
28.050 MHz
ANG BASE OPS
ID: 67292
Ref: 3768
TWR
118.700 MHz
TWR
ID: 67293
Ref: 3768
TWR
118.700 MHz
TWR
ID: 67293
Ref: 3768
UNIC
122.950 MHz
UNICOM
ID: 67294
Ref: 3768
UNIC
122.950 MHz
UNICOM
ID: 67294
Ref: 3768
Navigation Aids
CBU
TACAN
109.200 MHz
Columbia
Location
Latitude:
45.588600°
Longitude:
-122.611000°
Elevation:
22 ft
Additional Info
Usage:
BOTH
Power:
HIGH
Mag Var:
17.038°
DME Information
Channel:
029X
Frequency:
109.200 MHz
ID: 86629
CBU
TACAN
109.200 MHz
Columbia
Location
Latitude:
45.588600°
Longitude:
-122.611000°
Elevation:
22 ft
Additional Info
Usage:
BOTH
Power:
HIGH
Mag Var:
17.038°
DME Information
Channel:
029X
Frequency:
109.200 MHz
ID: 86629
PDX
VOR-DME
111.800 MHz
Portland
Location
Latitude:
45.593700°
Longitude:
-122.606003°
Elevation:
23 ft
Additional Info
Usage:
BOTH
Power:
MEDIUM
Mag Var:
17.039°
DME Information
Channel:
055X
Frequency:
111.800 MHz
ID: 92349
PDX
VOR-DME
111.800 MHz
Portland
Location
Latitude:
45.593700°
Longitude:
-122.606003°
Elevation:
23 ft
Additional Info
Usage:
BOTH
Power:
MEDIUM
Mag Var:
17.039°
DME Information
Channel:
055X
Frequency:
111.800 MHz
ID: 92349
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