Towered · Class D surface area
Southern Illinois (KMDH) radio calls
Carbondale/Murphysboro, ILICAO KMDH · FAA MDH
Southern Illinois is a towered airport in Carbondale/Murphysboro, IL. You will taxi with Ground on 121.8 and work Southern Tower on 125.35, after listening to the ATIS on 119.725. The tower operates 0700-2100 local.
The airport has a Class D surface area: two-way radio communication with the tower must be established before entering. Published hours: CLASS D SVC 0700-2100; OTHER TIMES CLASS G.
Frequencies
| ATIS | 119.725 |
|---|---|
| GroundSouthern Ground | 121.8 |
| TowerSouthern Tower | 125.35 |
| CTAF | 125.35 |
| UNICOM | 122.95 |
Airport
- Runways
- 06 · 24 · 18L · 36R · 18R · 36L
- Elevation
- 411 ft
- Tower hours
- 0700-2100 local
- Position
- 37.778, -89.252
Towered airport with a Class D surface area
Sample calls at KMDH
Southern Illinois has a Class D surface area: establish two-way communication with the tower before entering (AIM 3-2-5 b 3). A reply that uses your call sign, even "standby", establishes it; "aircraft calling, standby" does not. The calls below use runway 06; the tower assigns the runway in use on the day.
The aircraft is the AIM’s own example, Cessna Three One Six Zero Foxtrot; the squawk codes, altitudes and headings are illustrative. Frequencies, station names and runway numbers are this airport’s, from the FAA data.
- Listen to the ATIS on 119.725 first and note the letter; "with Information (letter)" on your first call lets the controller skip the weather (JO 7110.65 3-10-1).
- YouSouthern Ground, Cessna Three One Six Zero Foxtrot, at the ramp with Information Alpha, request taxi, VFR departure to the north.
- ATCCessna Six Zero Foxtrot, Southern Ground, runway zero six, taxi via Alpha, hold short of runway zero six.
- YouRunway zero six, taxi via Alpha, hold short of runway zero six, Cessna Six Zero Foxtrot.
- The runway, any clearance onto a runway and every hold-short instruction are read back (AIM 4-3-18 a 9). Stay on Ground through the run-up and switch to Tower when ready (AIM 4-3-14 a).
- YouSouthern Tower, Cessna Six Zero Foxtrot, holding short runway zero six, ready for departure, northbound.
- ATCCessna Six Zero Foxtrot, Southern Tower, runway zero six, cleared for takeoff.
- YouRunway zero six, cleared for takeoff, Cessna Six Zero Foxtrot.
- Inbound: call the tower about 15 miles out, before the Class D boundary (AIM 4-3-2 a).
- YouSouthern Tower, Cessna Three One Six Zero Foxtrot, one five miles north, three thousand, with Information Bravo, landing Southern.
- ATCCessna Six Zero Foxtrot, Southern Tower, enter left downwind runway zero six, report midfield downwind.
- YouEnter left downwind runway zero six, report midfield, Cessna Six Zero Foxtrot.
- YouSouthern Tower, Cessna Six Zero Foxtrot, midfield left downwind, runway zero six.
- ATCCessna Six Zero Foxtrot, runway zero six, cleared to land, wind two seven zero at eight.
- YouRunway zero six, cleared to land, Cessna Six Zero Foxtrot.
- The wind is information: acknowledged, not read back. Exit at the first available taxiway or as told, taxi clear of the hold-short markings, and change to Ground only when the tower says (AIM 4-3-21).
- ATCCessna Six Zero Foxtrot, exit at the next taxiway, contact Southern Ground one two one point eight.
- YouExit next taxiway, one two one point eight, Cessna Six Zero Foxtrot.
- YouSouthern Ground, Cessna Six Zero Foxtrot, clear of runway zero six, taxi to the ramp.
If things change. The tower operates 0700-2100 local. Outside those hours the airport is a non-towered field: self-announce on the CTAF, 125.35 with the airport name first and last, and the surface area reverts to Class E or Class G as published in the Chart Supplement.
Phraseology from AIM 4-2-3; 4-3-18 a 9; 4-3-14; 4-3-21; 4-4-7 b; 4-1-18 a 3; 3-2-5 b 3; 4-3-2 a. What TowerTalk grades against →
The calls you will make here
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Frequencies, runways and airspace from the FAA National Airspace System Resources (NASR) 28-day subscription, cycle effective Sep 3, 2026. Training use only. Always verify against a current Chart Supplement and sectional chart before flight; frequencies change. TowerTalk is not affiliated with the FAA. Report a discrepancy.
