AirNav: O12 - Grand Lake St Marys Seaplane Base

O12

Grand Lake St Marys Seaplane Base
St Marys, Ohio, USA

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FAA INFORMATION EFFECTIVE 19 MARCH 2026

Location

FAA Identifier:	O12
Lat/Long:	40-32-27.6700N 084-29-26.4300W 40-32.461167N 084-29.440500W 40.5410194,-84.4906750 (estimated)
Elevation:	871 ft. / 265 m (estimated)
From city:	5 miles NE of ST MARYS, OH
Time zone:	UTC -4 (UTC -5 during Standard Time)
Zip code:	45822

Seaplane Base Operations

Seaplane Base use:	Open to the public
Activation date:	04/1995
Control tower:	no
ARTCC:	INDIANAPOLIS CENTER
FSS:	DAYTON FLIGHT SERVICE STATION
NOTAMs facility:	DAY (NOTAM-D service available)
Attendance:	APR-NOV 0800-1700 ARPT CLSD NOV 15 TO APR 1 & MEMORIAL & LABOR DAY.
Segmented circle:	no

Seaplane Base Communications

CTAF:	122.9
WX AWOS-3PT at AXV (9 nm E):	128.325 (419-753-2821)

ACFT OPRG AT GRAND LAKE ST MARYS SHOULD MNT TFC ON LAKEFIELD CTAF & NEIL ARMSTRONG CTAF.

Nearby radio navigation aids

VOR radial/distance		VOR name		Freq		Var
RODr312/25.5		ROSEWOOD VORTAC		117.50		05W
DQNr353/31.8		DAYTON VOR/DME		114.50		01W

Seaplane Base Services

Fuel available:

100LL
100LL:100LL AVBL ON REQ, PPR, CTC KOZY MARINA 419-394-8797.

Runway Information

Runway 9W/27W

Dimensions:	7000 x 4000 ft. / 2134 x 1219 m
Surface:	water
	RUNWAY 9W	RUNWAY 27W
Traffic pattern:	left	right
Markings:	buoys, in good condition	buoys, in good condition

Seaplane Base Ownership and Management from official FAA records

Ownership:	Publicly-owned
Owner:	OHIO DIV OF PARKS & REC 834 EDGEWATER DR SAINT MARYS, OH 45885-1132 Phone 419-394-3611
Manager:	DAVID FALER, ASST PARK MGR GRAND LAKE SAINT MARYS STATE PARK, 834 EDGEWATER DR SAINT MARYS, OH 45885-1132 Phone 419-394-3611 CELL 419-656-7060.

Additional 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.

Instrument Procedures

There are no published instrument procedures at O12.

Some nearby airports with instrument procedures:

KCQA - Lakefield Airport (5 nm SW)
KAXV - Neil Armstrong Airport (9 nm E)
KVNW - Van Wert County Airport (20 nm N)
KVES - Darke County Airport (20 nm S)
KAOH - Lima Allen County Airport (23 nm NE)

Loc | Ops | Rwys | IFR | FBO | Links
Com | Nav | Svcs | Stats | Notes

Area around O12 (Grand Lake St Marys Seaplane Base)

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Aerial photo

Sectional chart

Airport distance calculator
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Sunrise and sunset

Times for 25-Mar-2026

	Local (UTC-4)	Zulu (UTC)
Morning civil twilight	07:07	11:07
Sunrise	07:34	11:34
Sunset	19:54	23:54
Evening civil twilight	20:21	00:21

Current date and time

Zulu (UTC)	25-Mar-2026 15:34:10
Local (UTC-4)	25-Mar-2026 11:34:10

METAR

KAXV
9nm E

251515Z AUTO 17008KT 10SM CLR 10/00 A3014 RMK AO2

TAF

KDAY 40nm S	251122Z 2512/2612 13006KT P6SM SCT100 BKN150 FM251400 16008KT P6SM BKN250 FM251700 20012KT P6SM BKN200 FM260900 21009KT P6SM VCSH BKN010 OVC025 TEMPO 2611/2612 5SM -SHRA BKN010
KFWA 41nm NW	251120Z 2512/2612 15007KT P6SM SCT080 OVC180 FM251500 18013KT P6SM BKN200 FM251900 21014G24KT P6SM BKN250 FM252300 22013KT P6SM SCT250 FM260300 22009KT P6SM SCT050 BKN100 WS020/23040KT FM260700 21011KT P6SM VCSH SCT025 BKN050 PROB30 2609/2612 4SM -SHRA BR OVC025
KFDY 47nm NE	251120Z 2512/2612 15005KT P6SM FEW090 BKN200 FM251400 18007KT P6SM FEW090 BKN200 FM251800 21010KT P6SM SCT090 BKN200 FM260300 21012KT P6SM FEW030 BKN090 BKN200 WS020/24040KT TEMPO 2608/2612 -SHRA OVC030
KFFO 48nm SE	250300Z 2503/2609 14009KT 9999 FEW080 BKN150 QNH3018INS BECMG 2515/2516 18012KT 9999 SCT080 BKN150 QNH2996INS TEMPO 2518/2601 21012G18KT WND 150V270 BECMG 2608/2609 21010G15KT 9999 VCSH BKN080 OVC130 QNH2995INS TX19/2520Z TN03/2511Z

NOTAMs

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