Lake In The Hills frequencies

Lake In The Hills (3CK) in Chicago/Lake In The Hills, IL has no control tower, so nobody is sequencing traffic here — you announce your own position on 123.05. Every frequency below is in the order you tune it. · Open on the map

All of Lake In The Hills — runways, frequencies, charts and live weather

Taxi & takeoff

CTAF 123.05
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 123.05
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.

Departure & arrival Chicago

App/Dep 120.55
One radar controller working both arrivals and departures — normal at a smaller TRACON. The same frequency takes your climb out and your inbound call.

What to say on 123.05

Nobody is sequencing traffic at 3CK, so every call is you telling other aircraft where you are. Open and close with the field name so a pilot tuned to a shared frequency knows which airport you mean — 123.05 is not unique to Lake In The Hills.

  • Inbound, 10 miles out Lake In The Hills traffic, Skyhawk one two three four five, one zero miles south, inbound landing runway 08, Lake In The Hills.
  • Entering the pattern Lake In The Hills traffic, Skyhawk one two three four five, entering left downwind runway 08, Lake In The Hills.
  • Before taking the runway Lake In The Hills traffic, Skyhawk one two three four five, departing runway 08, Lake In The Hills.

Pattern direction is not always left here — check the 3CK traffic pattern before you announce a leg. The Chart Supplement is authoritative if 3CK publishes a call name that differs from the airport's. Full guidance →

By procedure & sector (1 more)
306.925APCH/P DEP/P
Every 3CK frequency, as one table
CTAF123.05
UNICOM123.05
App/Dep120.55

Frequently asked

What is the CTAF at 3CK?

Lake In The Hills is non towered. The common traffic advisory frequency is 123.05 — announce your position and intentions on entry and on each leg of the pattern.

What is the approach frequency for 3CK?

App/Dep for Lake In The Hills is 120.55, working as "Chicago". Call inbound for flight following or to begin an instrument approach.