Montgomery County Airpark frequencies
Montgomery County Airpark (GAI · KGAI) in Gaithersburg, MD has no control tower, so nobody is sequencing traffic here — you announce your own position on 123.075. Every frequency below is in the order you tune it. · Open on the map
All of Montgomery County Airpark — runways, frequencies, charts and live weatherBefore taxi
- ASOS/AWOS 128.275
- 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.
- Clearance 121.6
- 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 123.075
- 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 123.075
- 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 Potomac
- App/Dep 128.7 (TERPZ departures)
- 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 123.075
Nobody is sequencing traffic at KGAI, 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 — 123.075 is not unique to Montgomery County Airpark.
- Inbound, 10 miles out
Montgomery traffic, Skyhawk one two three four five, one zero miles south, inbound landing runway 14, Montgomery.
- Entering the pattern
Montgomery traffic, Skyhawk one two three four five, entering left downwind runway 14, Montgomery.
- Before taking the runway
Montgomery traffic, Skyhawk one two three four five, departing runway 14, Montgomery.
Pattern direction is not always left here — check the KGAI traffic pattern before you announce a leg. The Chart Supplement is authoritative if KGAI publishes a call name that differs from the airport's. Full guidance →
By procedure & sector (4 more)
| 126.75 | TRSTN STAR |
|---|---|
| 128.7 | TERPZ DP |
| 307.2 | TRSTN STAR |
| 307.9 | APCH/P DEP/P, TERPZ DP |
Every KGAI frequency, as one table
| ASOS/AWOS | 128.275 |
|---|---|
| Clearance | 121.6 |
| CTAF | 123.075 |
| UNICOM | 123.075 |
| App/Dep | 128.7 · TERPZ departures |
Frequently asked
What is the CTAF at KGAI?
Montgomery County Airpark is non towered. The common traffic advisory frequency is 123.075 — announce your position and intentions on entry and on each leg of the pattern.
What is the ASOS/AWOS frequency at KGAI?
ASOS/AWOS at Montgomery County Airpark is 128.275. 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 KGAI?
App/Dep for Montgomery County Airpark is 128.7, working as "Potomac" (TERPZ departures). Call inbound for flight following or to begin an instrument approach.
Where do I get my clearance at KGAI?
Clearance delivery at Montgomery County Airpark is 121.6. Call before requesting taxi, with the current ATIS letter and your direction of flight.
More about KGAI
Frequencies from FAA NASR. For planning and education only; always verify against official sources.