Navigation & Radio at Ottawa Macdonald-Cartier International Airport
CA
YOW
/
CYOW
Radio Frequencies
9
Navigation Aids
7
Radio Frequencies
ARR
135.150 MHz
Ottawa Arrivals
ID: 50780
Ref: 1840
ATIS
121.150 MHz
English ATIS
ID: 50781
Ref: 1840
ATIS
132.950 MHz
French ATIS
ID: 75186
Ref: 1840
CLNC DEL
119.400 MHz
Ottawa Clearance
ID: 50782
Ref: 1840
DEP
128.175 MHz
Ottawa Departures
ID: 50783
Ref: 1840
GND
121.900 MHz
Ottawa Ground
ID: 50784
Ref: 1840
RCO
123.150 MHz
Quebec Radio
ID: 50785
Ref: 1840
TML
127.700 MHz
Ottawa Terminal
ID: 75187
Ref: 1840
TWR
118.800 MHz
Ottawa Tower
ID: 50786
Ref: 1840
Navigation Aids
IOW
DME
109.500 MHz
Ottawa
Location
Latitude:
45.313801°
Longitude:
-75.666801°
Elevation:
374 ft
Additional Info
Usage:
TERMINAL
Power:
LOW
Mag Var:
-13.497°
DME Information
Channel:
032X
Frequency:
109.500 MHz
ID: 89293
OW
NDB
0.236 MHz
Ottawa
Location
Latitude:
45.360001°
Longitude:
-75.561096°
Elevation:
N/A ft
Additional Info
Usage:
BOTH
Power:
LOW
Mag Var:
-13.551°
ID: 92167
OW
NDB
0.236 MHz
Ottawa
Location
Latitude:
45.360001°
Longitude:
-75.561096°
Elevation:
N/A ft
Additional Info
Usage:
BOTH
Power:
LOW
Mag Var:
-13.551°
ID: 92167
YOW
VOR-DME
114.600 MHz
Ottawa
Location
Latitude:
45.441700°
Longitude:
-75.897003°
Elevation:
450 ft
Additional Info
Usage:
BOTH
Power:
HIGH
Mag Var:
-13.400°
DME Information
Channel:
093X
Frequency:
114.600 MHz
ID: 95783
YOW
VOR-DME
114.600 MHz
Ottawa
Location
Latitude:
45.441700°
Longitude:
-75.897003°
Elevation:
450 ft
Additional Info
Usage:
BOTH
Power:
HIGH
Mag Var:
-13.400°
DME Information
Channel:
093X
Frequency:
114.600 MHz
ID: 95783
YRR
NDB
0.377 MHz
Greely
Location
Latitude:
45.268299°
Longitude:
-75.573601°
Elevation:
N/A ft
Additional Info
Usage:
LO
Power:
LOW
Mag Var:
-13.524°
ID: 95828
YRR
NDB
0.377 MHz
Greely
Location
Latitude:
45.268299°
Longitude:
-75.573601°
Elevation:
N/A ft
Additional Info
Usage:
LO
Power:
LOW
Mag Var:
-13.524°
ID: 95828
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