USAF Academy Bullseye AUX Airfield frequencies
USAF Academy Bullseye AUX Airfield (CO90) in Ellicott, CO has no control tower, so nobody is sequencing traffic here — you announce your own position on 122.725. Every frequency below is in the order you tune it. · Open on the map
All of USAF Academy Bullseye AUX Airfield — runways, frequencies, charts and live weatherBefore taxi
- ASOS/AWOS 125.0
- 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
- UNICOM 122.725
- 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.
What to say on 122.725
Nobody is sequencing traffic at CO90, 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 — 122.725 is not unique to USAF Academy Bullseye AUX Airfield.
- Inbound, 10 miles out
USAF Academy Bullseye AUX traffic, Skyhawk one two three four five, one zero miles south, inbound landing runway 17, USAF Academy Bullseye AUX.
- Entering the pattern
USAF Academy Bullseye AUX traffic, Skyhawk one two three four five, entering left downwind runway 17, USAF Academy Bullseye AUX.
- Before taking the runway
USAF Academy Bullseye AUX traffic, Skyhawk one two three four five, departing runway 17, USAF Academy Bullseye AUX.
Pattern direction is not always left here — check the CO90 traffic pattern before you announce a leg. The Chart Supplement is authoritative if CO90 publishes a call name that differs from the airport's. Full guidance →
Every CO90 frequency, as one table
| ASOS/AWOS | 125.0 |
|---|---|
| UNICOM | 122.725 |
Frequently asked
What is the CTAF at CO90?
USAF Academy Bullseye AUX Airfield is non towered. The common traffic advisory frequency is 122.725 — announce your position and intentions on entry and on each leg of the pattern.
What is the ASOS/AWOS frequency at CO90?
ASOS/AWOS at USAF Academy Bullseye AUX Airfield is 125.0. It is an automated broadcast, so there is no letter to report — just take the altimeter setting and wind.
More about CO90
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.