Navigation & Radio at Roberts International Airport
LR
ROB
/
GLRB
Radio Frequencies
7
Navigation Aids
6
Radio Frequencies
A/G
345.200 MHz
A/G VOICE RDO
ID: 55178
Ref: 3099
A/G
345.200 MHz
A/G VOICE RDO
ID: 55178
Ref: 3099
APP
124.500 MHz
ROBERTS APP
ID: 55179
Ref: 3099
GND
121.900 MHz
GND
ID: 55180
Ref: 3099
GND
121.900 MHz
GND
ID: 55180
Ref: 3099
TWR
118.300 MHz
ROBERTS TWR
ID: 55181
Ref: 3099
TWR
118.300 MHz
ROBERTS TWR
ID: 55181
Ref: 3099
Navigation Aids
FR
NDB
0.263 MHz
Monrovia Roberts
Location
Latitude:
6.216210°
Longitude:
-10.383300°
Elevation:
N/A ft
Additional Info
Usage:
TERMINAL
Power:
LOW
Mag Var:
-8.070°
ID: 88127
FR
NDB
0.263 MHz
Monrovia Roberts
Location
Latitude:
6.216210°
Longitude:
-10.383300°
Elevation:
N/A ft
Additional Info
Usage:
TERMINAL
Power:
LOW
Mag Var:
-8.070°
ID: 88127
MO
NDB
0.372 MHz
Monrovia Roberts
Location
Latitude:
6.242870°
Longitude:
-10.353300°
Elevation:
31 ft
Additional Info
Usage:
BOTH
Power:
MEDIUM
Mag Var:
-8.058°
ID: 91148
MO
NDB
0.372 MHz
Monrovia Roberts
Location
Latitude:
6.242870°
Longitude:
-10.353300°
Elevation:
31 ft
Additional Info
Usage:
BOTH
Power:
MEDIUM
Mag Var:
-8.058°
ID: 91148
ROB
VOR-DME
113.800 MHz
Monrovia Roberts
Location
Latitude:
6.239540°
Longitude:
-10.358300°
Elevation:
31 ft
Additional Info
Usage:
BOTH
Power:
HIGH
Mag Var:
-8.060°
DME Information
Channel:
085X
Frequency:
113.800 MHz
ID: 93184
ROB
VOR-DME
113.800 MHz
Monrovia Roberts
Location
Latitude:
6.239540°
Longitude:
-10.358300°
Elevation:
31 ft
Additional Info
Usage:
BOTH
Power:
HIGH
Mag Var:
-8.060°
DME Information
Channel:
085X
Frequency:
113.800 MHz
ID: 93184
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