Southern Illinois Airport frequencies
Southern Illinois Airport (MDH · KMDH) in Murphysboro, IL is a towered field, staffed 0700-2100. Every frequency below is in the order you tune it, from the first call to the handoff on climb out. · Open on the map
All of Southern Illinois Airport — runways, frequencies, charts and live weatherWhen the KMDH tower is closed
The tower is staffed 0700-2100. Outside those hours Southern Illinois Airport has no operating control tower: it becomes a self announce field on 125.35, and separation from other traffic is yours, not a controller's. Report your position and intentions on entry and on each leg of the pattern.
Runway lighting is often pilot controlled once the tower closes — check the KMDH airport page for the click sequence, and what to say on the radio.
Before taxi Southern
- ATIS 119.725
- A recorded loop of the field's weather, active runway and any notices, updated hourly or whenever conditions change. Listen before your first call, and tell the controller which letter you have so they do not read it to you again.
Taxi & takeoff Southern
- Ground 121.8
- Ground control owns every taxiway and inactive runway on the field. Call for taxi with your position and destination on the field. You need an explicit clearance to cross any runway, including one that is not in use.
- Tower 125.35 (primary), 126.25 (secondary)
- Tower owns the active runways and the surrounding surface area. Call before entering the surface area inbound, and hold short until you are cleared to take off or to cross.
Also
- CTAF 125.35
- The common frequency pilots use to announce themselves to each other at a field with no operating control tower. Nobody is controlling traffic — you are self announcing. Report your position and intentions on entry and on each leg of the pattern, and listen well before you transmit.
- UNICOM 122.95
- A ground station run by the FBO rather than the FAA, for fuel, parking and airport services. Use it for services. Where the field has no separate CTAF, the same frequency doubles as the advisory frequency.
- Flight service 127.475 (LOW)
- Flight Service handles briefings, flight plans and en route advisories, reached here through a remote outlet. Open and close VFR flight plans, and get updated weather in the air. 1-800-WX-BRIEF reaches the same specialists from the ground.
By procedure & sector (2 more)
| 322.4 | LCL/P |
|---|---|
| 346.275 | MARION RCAG (LOW) |
Every KMDH frequency, as one table
| ATIS | 119.725 |
|---|---|
| Ground | 121.8 |
| Tower | 125.35 (primary), 126.25 (secondary) |
| CTAF | 125.35 |
| UNICOM | 122.95 |
| Flight service | 127.475 (LOW) |
Frequently asked
What is the tower frequency at KMDH?
Southern Illinois Airport tower is 125.35 (primary), 126.25 (secondary), calling "Southern Tower". The tower is staffed 0700-2100.
What frequency do I use at KMDH when the tower is closed?
Outside 0700-2100, Southern Illinois Airport has no operating control tower and becomes a self announce field. Use 125.35 as the CTAF and report your position and intentions — there is nobody to clear you, so separation is yours.
What is the ground frequency at KMDH?
Ground control at Southern Illinois Airport is 121.8. You need an explicit clearance from ground to cross any runway while taxiing, including one that is not in use.
What is the ATIS frequency at KMDH?
ATIS at Southern Illinois Airport is 119.725. Listen before your first call and report the letter you have.
More about KMDH
Frequencies from FAA NASR. For planning and education only; always verify against official sources.