Mulino State frequencies
Mulino State (4S9) in Portland-Mulino, OR 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 Mulino State — runways, frequencies, charts and live weatherBefore taxi
- Clearance 119.95
- Clearance delivery issues your IFR clearance, and at busier fields your VFR departure instructions and squawk code. Call before you request taxi, with the ATIS letter and your intended direction of flight.
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.
What to say on 123.05
Nobody is sequencing traffic at 4S9, 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 Mulino State.
- Inbound, 10 miles out
Mulino State traffic, Skyhawk one two three four five, one zero miles south, inbound landing runway 14, Mulino State.
- Entering the pattern
Mulino State traffic, Skyhawk one two three four five, entering left downwind runway 14, Mulino State.
- Before taking the runway
Mulino State traffic, Skyhawk one two three four five, departing runway 14, Mulino State.
Pattern direction is not always left here — check the 4S9 traffic pattern before you announce a leg. The Chart Supplement is authoritative if 4S9 publishes a call name that differs from the airport's. Full guidance →
Every 4S9 frequency, as one table
| Clearance | 119.95 |
|---|---|
| CTAF | 123.05 |
| UNICOM | 123.05 |
Frequently asked
What is the CTAF at 4S9?
Mulino State 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.
Where do I get my clearance at 4S9?
Clearance delivery at Mulino State is 119.95. Call before requesting taxi, with the current ATIS letter and your direction of flight.
More about 4S9
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.