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O12Seaplane Base

GRAND LAKE ST MARYS

ST MARYS, Ohio

Public usePublic871 ft MSL

Seaplane Base Information

Facility Type

SEAPLANE BASE

Elevation

871 ft MSL

Ownership

Public

Use

Public use

Fuel Types

100LL

Coordinates

40.5410, -84.4907

County

AUGLAIZE

Water Lanes

IDLengthWidthSurface
09W/27W7,000 ft4000 ftWATER

Frequencies

TypeFrequencyName
CTAF122.9GRAND LAKE ST MARYS

Floatplane intelligence for O12

Live weather, decoded NOTAMs, AI briefings. Included in every AeroCopilot plan from $7.99/month.

Source: FAA NASR (seaplane base facility, water lanes, frequencies). Updated 2026-05-12 15:42 UTC.