Navigation & Radio at Washington Dulles International Airport
US
IAD
/
KIAD
Radio Frequencies
18
Navigation Aids
4
Radio Frequencies
APP
120.450 MHz
POTOMAC APP
ID: 67113
Ref: 3602
APP
120.450 MHz
POTOMAC APP
ID: 67113
Ref: 3602
ATIS
134.850 MHz
ATIS
ID: 67114
Ref: 3602
ATIS
134.850 MHz
ATIS
ID: 67114
Ref: 3602
CLD
135.700 MHz
CLNC DEL
ID: 67115
Ref: 3602
CLD
135.700 MHz
CLNC DEL
ID: 67115
Ref: 3602
DEP
125.050 MHz
POTOMAC DEP
ID: 67116
Ref: 3602
DEP
125.050 MHz
POTOMAC DEP
ID: 67116
Ref: 3602
GND
121.900 MHz
GND
ID: 67117
Ref: 3602
GND
121.900 MHz
GND
ID: 67117
Ref: 3602
RCO
113.500 MHz
ARMEL RCO
ID: 67118
Ref: 3602
RCO
113.500 MHz
ARMEL RCO
ID: 67118
Ref: 3602
RMP
129.550 MHz
RAMP CON
ID: 67119
Ref: 3602
RMP
129.550 MHz
RAMP CON
ID: 67119
Ref: 3602
TWR
120.100 MHz
TWR
ID: 67120
Ref: 3602
TWR
120.100 MHz
TWR
ID: 67120
Ref: 3602
UNIC
122.950 MHz
UNICOM
ID: 67121
Ref: 3602
UNIC
122.950 MHz
UNICOM
ID: 67121
Ref: 3602
Navigation Aids
AML
VORTAC
113.500 MHz
Armel
Location
Latitude:
38.934601°
Longitude:
-77.466698°
Elevation:
297 ft
Additional Info
Usage:
BOTH
Power:
MEDIUM
Mag Var:
-10.239°
DME Information
Channel:
082X
Frequency:
113.500 MHz
ID: 85452
AML
VORTAC
113.500 MHz
Armel
Location
Latitude:
38.934601°
Longitude:
-77.466698°
Elevation:
297 ft
Additional Info
Usage:
BOTH
Power:
MEDIUM
Mag Var:
-10.239°
DME Information
Channel:
082X
Frequency:
113.500 MHz
ID: 85452
IA
NDB
0.346 MHz
Tille
Location
Latitude:
38.847198°
Longitude:
-77.437798°
Elevation:
N/A ft
Additional Info
Usage:
TERMINAL
Power:
LOW
Mag Var:
-10.236°
ID: 89110
IA
NDB
0.346 MHz
Tille
Location
Latitude:
38.847198°
Longitude:
-77.437798°
Elevation:
N/A ft
Additional Info
Usage:
TERMINAL
Power:
LOW
Mag Var:
-10.236°
ID: 89110
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