Grand Lake St Marys Seaplane Base frequencies

Radio frequencies for Grand Lake St Marys Seaplane Base (O12) in St Marys, OH — tower, ground, ATIS, CTAF, and approach/departure for your radio setup.

All of Grand Lake St Marys Seaplane Base — runways, frequencies, charts and live weather

Tower & ground

CTAF	122.9

Frequently asked

What is the CTAF frequency at O12?

Grand Lake St Marys Seaplane Base's CTAF frequency is 122.9.

More about O12

Frequencies from FAA NASR. For planning and education only; always verify against official sources.