Navigation & Radio at Manuel Crescencio Rejón International Airport
MX
MID
/
MMMD
Radio Frequencies
8
Navigation Aids
4
Radio Frequencies
APP
121.200 MHz
MERIDA APPROACH
ID: 310127
Ref: 4726
APP
121.200 MHz
MERIDA APPROACH
ID: 310127
Ref: 4726
ATIS
127.900 MHz
ATIS
ID: 55428
Ref: 4726
ATIS
127.900 MHz
ATIS
ID: 55428
Ref: 4726
INFO
126.900 MHz
MERIDA INFO
ID: 55429
Ref: 4726
INFO
126.900 MHz
MERIDA INFO
ID: 55429
Ref: 4726
TWR
118.300 MHz
MERIDA TWR
ID: 55427
Ref: 4726
TWR
118.300 MHz
MERIDA TWR
ID: 55427
Ref: 4726
Navigation Aids
MID
VOR-DME
117.700 MHz
Merida
Location
Latitude:
20.938000°
Longitude:
-89.656197°
Elevation:
38 ft
Additional Info
Usage:
BOTH
Power:
HIGH
Mag Var:
1.177°
DME Information
Channel:
124X
Frequency:
117.700 MHz
ID: 90967
MID
VOR-DME
117.700 MHz
Merida
Location
Latitude:
20.938000°
Longitude:
-89.656197°
Elevation:
38 ft
Additional Info
Usage:
BOTH
Power:
HIGH
Mag Var:
1.177°
DME Information
Channel:
124X
Frequency:
117.700 MHz
ID: 90967
MPG
NDB
0.280 MHz
Progreso
Location
Latitude:
21.273399°
Longitude:
-89.713600°
Elevation:
18 ft
Additional Info
Usage:
BOTH
Power:
MEDIUM
Mag Var:
1.172°
ID: 91201
MPG
NDB
0.280 MHz
Progreso
Location
Latitude:
21.273399°
Longitude:
-89.713600°
Elevation:
18 ft
Additional Info
Usage:
BOTH
Power:
MEDIUM
Mag Var:
1.172°
ID: 91201
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