Non-towered · Class G at the surface
Monmouth Municipal (C66) radio calls
Monmouth, ILFAA identifier C66; no ICAO code assigned
Monmouth Municipal is a non-towered airport in Monmouth, IL. Nobody clears you to do anything: you self-announce on the CTAF, 122.8, as Monmouth Municipal Traffic, with the airport name at the start and end of each call. The approach control for the area is Quad City Approach on 133.275, which is who you call for VFR flight following.
No Class B, C, D or E surface area is designated for this airport in the FAA data, so the airspace at the surface is Class G.
Frequencies
| Clearance Delivery | 120.7 |
|---|---|
| CTAFMonmouth Municipal Traffic | 122.8 |
| Approach / DepartureQuad City Approach | 133.275 |
Airport
- Runways
- 03 · 21
- Elevation
- 753 ft
- Position
- 40.930, -90.631
Non-towered airport: self-announce on the CTAF
Sample calls at C66
Monmouth Municipal has no operating control tower. Every call below goes out on the CTAF, 122.8, to the other aircraft, not to a controller. The runway shown is 03; use whichever runway the wind and the traffic dictate 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.
- Tune 122.8. Nobody clears you; you announce and you listen. The airport name goes at the start and the end of every call, and the runway is always a number, never "the active" (AIM 4-1-9 g 8).
- YouMonmouth Municipal traffic, Cessna Three One Six Zero Foxtrot, taxiing to runway zero three, Monmouth Municipal.
- YouMonmouth Municipal traffic, Cessna Six Zero Foxtrot, departing runway zero three, departing the pattern to the north, Monmouth Municipal.
- Announce until you are about 10 miles out; on the way back, start announcing at 10 miles (AIM 4-1-9 c 1, TBL 4-1-1).
- YouMonmouth Municipal traffic, Cessna Three One Six Zero Foxtrot, one zero miles south, two thousand five hundred, landing Monmouth Municipal, Monmouth Municipal.
- YouMonmouth Municipal UNICOM, Cessna Six Zero Foxtrot, one zero miles south, request wind and runway information, Monmouth Municipal.
- A UNICOM operator, if one is on, answers with the wind and the runway in use (AIM 4-1-9 h). If nobody answers, choose the runway from the wind and the pattern traffic you can hear.
- YouMonmouth Municipal traffic, Cessna Six Zero Foxtrot, entering left downwind runway zero three, full stop, Monmouth Municipal.
- YouMonmouth Municipal traffic, Cessna Six Zero Foxtrot, left base runway zero three, Monmouth Municipal.
- YouMonmouth Municipal traffic, Cessna Six Zero Foxtrot, final runway zero three, full stop, Monmouth Municipal.
- YouMonmouth Municipal traffic, Cessna Six Zero Foxtrot, clear of runway zero three, Monmouth Municipal.
If things change. Want flight following after departure? Call Quad City Approach on 133.275 once clear of the pattern: identification, type, position, altitude, destination, "request VFR flight following" (AIM 4-1-18 a 3). Do not use "any traffic in the area, please advise"; the AIM says it is not to be used under any condition (AIM 4-1-9 g 1).
Phraseology from AIM 4-1-9 c 1, g 1, g 8, h; TBL 4-1-1; 4-3-3. 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.
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