Grand Lake St Marys Seaplane Base (O12)

Location & QuickFacts

FAA Information Effective	2026-07-09
Airport Identifier	O12
Airport Status	Operational
Longitude/Latitude	84°29'26.4300" W / 40°32'27.6700" N -84.490675 / 40.541019 (Estimated)
Elevation	871.00 ft / 265.48 m (Estimated)
Land	643 acres
From nearest city	5 nautical miles W of St Marys, OH
Location	Auglaize County, OH

Owner & Manager

Ownership	Publicly owned
Owner	OHIO DIV OF PARKS & REC
Address	834 EDGEWATER DR SAINT MARYS, OH 45885-1132
Phone number	419-394-3611
Manager	DAVID FALER, ASST PARK MGR
Address	GRAND LAKE SAINT MARYS STATE PARK 834 EDGEWATER DR SAINT MARYS, OH 45885-1132
Phone number	419-394-3611

Airport Operations and Facilities

Airport Use	Open to public
Segmented Circle	No
Control Tower	NON-ATCT
Sectional chart	DETROIT
Region	AGL - Great Lakes
Responsible ARTCC	ZID - INDIANAPOLIS
Tie-in FSS	DAY - DAYTON
FSS on Airport	No
FSS Toll Free	1-800-WX-BRIEF
NOTAMs Facility	DAY (NOTAM-d service available)

Airport Communications

CTAF

122.9 MHz

Airport Services

Fuel types

100LL

Runway Information

Runway 09W/27W

Dimensions	7000 x 4000 ft (2134 x 1219 m)
Surface	WATER
Surface treatment

	09W	27W
Traffic pattern	Left	Right
Runway marking	Buoys (seaplane base) , Good Condition	Buoys (seaplane base) , Good Condition

Radio Navigation Aids

ID	Type	Name	Ch	Freq	Var	Dist
MIE	DME	MUNCIE	91X	114.40		45.2 nm
RID	DME	RICHMOND	83Y	113.65		49.9 nm
AT	NDB	BRUNY		315.00	06W	42.3 nm
JN	NDB	BALLL		365.00	03W	43.8 nm
FFO	TACAN	PATTERSON	29X	109.20	04W	47.8 nm
DQN	VOR/DME	DAYTON	92X	114.50	01W	31.8 nm
ROD	VORTAC	ROSEWOOD	122X	117.50	05W	25.5 nm
FWA	VORTAC	FORT WAYNE	125X	117.80	06W	41.2 nm
FBC	VORTAC	FLAG CITY	19X	108.20	02W	41.7 nm
DAY	VOT	DAYTON J M COX-DAY		111.00		40.7 nm

Remarks

• NO NGT OPS.
• NO PUB DOCKS; PPR FOR PVT DOCK TIE UP; CALL KOZY MARINA 419-394-8797.
• FOR CD CTC COLUMBUS APCH AT 614-338-8537.
• PRVDD 20:1 APCH; OIL WELL TO THE S MKD & LGTD; SEA LANES MKD & LGTD PER AC 150/5395-1.