Frequencies
Union County Airport (MRT)
Air Traffic Control
| Frequency | License | Type | Tone | Alpha Tag | Description | Mode | Tag |
|---|---|---|---|---|---|---|---|
| 119.275 | WXS9 | B | CSQ | KMRT AWOS (old) | Automated Weather Observation System (old) | AM | Aircraft |
| 120.200 | BM | CSQ | CMH AP/DP | Columbus Approach/Departure | AM | Aircraft | |
| 122.800 | KFX6 | BM | CSQ | KMRT CTAF (old) | CTAF/Unicom (old) | AM | Aircraft |
| 123.050 | BM | CSQ | KMRT CTAF | CTAF/Unicom | AM | Aircraft | |
| 126.500 | BM | CSQ | KMRT AWOS | Automated Weather Observation System | AM | Aircraft |