Grosse Ile Municipal Airport frequencies
Grosse Ile Municipal Airport (ONZ · KONZ) in Detroit/Grosse Ile, MI has no control tower, so nobody is sequencing traffic here — you announce your own position on 123.0. Every frequency below is in the order you tune it. · Open on the map
All of Grosse Ile Municipal Airport — runways, frequencies, charts and live weatherBefore taxi
- ASOS/AWOS 119.675
- An automated weather station reading the field conditions aloud — wind, visibility, ceiling, temperature and altimeter. It replaces ATIS at a field with no controller to record one. Get the altimeter setting before you descend below the transition altitude.
Taxi & takeoff
- CTAF 123.0
- 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 123.0
- 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 Detroit
- App/Dep 134.3
- 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 123.0
Nobody is sequencing traffic at KONZ, 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 — 123.0 is not unique to Grosse Ile Municipal Airport.
- Inbound, 10 miles out
Grosse Ile traffic, Skyhawk one two three four five, one zero miles south, inbound landing runway 04, Grosse Ile.
- Entering the pattern
Grosse Ile traffic, Skyhawk one two three four five, entering left downwind runway 04, Grosse Ile.
- Before taking the runway
Grosse Ile traffic, Skyhawk one two three four five, departing runway 04, Grosse Ile.
Pattern direction is not always left here — check the KONZ traffic pattern before you announce a leg. The Chart Supplement is authoritative if KONZ publishes a call name that differs from the airport's. Full guidance →
By procedure & sector (1 more)
| 284.0 | APCH/P DEP/P |
|---|
Every KONZ frequency, as one table
| ASOS/AWOS | 119.675 |
|---|---|
| CTAF | 123.0 |
| UNICOM | 123.0 |
| App/Dep | 134.3 |
Frequently asked
What is the CTAF at KONZ?
Grosse Ile Municipal Airport is non towered. The common traffic advisory frequency is 123.0 — announce your position and intentions on entry and on each leg of the pattern.
What is the ASOS/AWOS frequency at KONZ?
ASOS/AWOS at Grosse Ile Municipal Airport is 119.675. It is an automated broadcast, so there is no letter to report — just take the altimeter setting and wind.
What is the approach frequency for KONZ?
App/Dep for Grosse Ile Municipal Airport is 134.3, working as "Detroit". Call inbound for flight following or to begin an instrument approach.
More about KONZ
Frequencies from FAA NASR. For planning and education only; always verify against official sources.
Something here wrong or out of date? Report a data problem.