Navigation & Radio at RAF Northolt
GB
NHT
/
EGWU
Radio Frequencies
19
Navigation Aids
2
Radio Frequencies
APP
126.450 MHz
APP
ID: 58488
Ref: 2496
ATIS
125.125 MHz
ID: 307808
Ref: 2496
ATIS
125.125 MHz
ID: 307808
Ref: 2496
ATIS
300.350 MHz
ATIS
ID: 58489
Ref: 2496
ATIS
300.350 MHz
ATIS
ID: 58489
Ref: 2496
DEP
120.325 MHz
ID: 307809
Ref: 2496
DEP
120.325 MHz
ID: 307809
Ref: 2496
DEP
129.125 MHz
DEP
ID: 58490
Ref: 2496
DEP
129.125 MHz
DEP
ID: 58490
Ref: 2496
DIR
130.350 MHz
ID: 307810
Ref: 2496
DIR
130.350 MHz
ID: 307810
Ref: 2496
GRN
121.575 MHz
ID: 307811
Ref: 2496
OPS
132.650 MHz
OPS
ID: 58491
Ref: 2496
OPS
132.650 MHz
OPS
ID: 58491
Ref: 2496
RDR
125.875 MHz
Talk down
ID: 307812
Ref: 2496
RDR
125.875 MHz
Talk down
ID: 307812
Ref: 2496
TWR
120.675 MHz
TWR
ID: 58492
Ref: 2496
TWR
120.675 MHz
TWR
ID: 58492
Ref: 2496
TWR
281.175 MHz
ID: 307813
Ref: 2496
Navigation Aids
CHT
NDB
0.277 MHz
Chiltern
Location
Latitude:
51.623100°
Longitude:
-0.518333°
Elevation:
N/A ft
Additional Info
Usage:
LO
Power:
LOW
Mag Var:
-2.267°
ID: 86778
CHT
NDB
0.277 MHz
Chiltern
Location
Latitude:
51.623100°
Longitude:
-0.518333°
Elevation:
N/A ft
Additional Info
Usage:
LO
Power:
LOW
Mag Var:
-2.267°
ID: 86778
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