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 16 APRIL 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
Flying to Grand Lake St Marys Seaplane Base? Find the distance to fly. From to O12

Sunrise and sunset

Times for 04-May-2026

	Local (UTC-4)	Zulu (UTC)
Morning civil twilight	06:04	10:04
Sunrise	06:34	10:34
Sunset	20:35	00:35
Evening civil twilight	21:05	01:05

Current date and time

Zulu (UTC)	04-May-2026 07:35:09
Local (UTC-4)	04-May-2026 03:35:09

METAR

KAXV
9nm E

040655Z AUTO 19009KT 10SM CLR 10/03 A2981 RMK AO2

TAF

KDAY 40nm S	040536Z 0406/0506 20010KT P6SM BKN100 FM041200 21013KT P6SM FEW025 SCT060 FM041500 23017G27KT P6SM SCT050 BKN100 PROB30 0421/0424 4SM -TSRA BR BKN050CB FM050000 22012G21KT P6SM BKN100
KFWA 41nm NW	040520Z 0406/0506 21011G18KT P6SM FEW250 FM041600 28018G28KT P6SM SCT070 PROB30 0420/0502 4SM -TSRA BKN050CB
KFDY 47nm NE	040540Z 0406/0506 21012KT P6SM SCT090 WS020/23040KT FM041200 21013KT P6SM SKC FM041400 22017G27KT P6SM SCT050 SCT090 FM042200 22015G25KT P6SM VCTS BKN060CB TEMPO 0422/0501 5SM -SHRA BKN005 FM050200 21014G24KT P6SM SCT060 BKN100
KFFO 48nm SE	040300Z 0403/0509 VRB06KT 9999 SCT040 OVC060 WS020/21045KT 620605 QNH2980INS BECMG 0413/0414 21014KT 9999 FEW035 BKN050 OVC080 520104 QNH2969INS TEMPO 0415/0421 22015G25KT BECMG 0420/0421 22015G25KT 9000 -SHRA SCT080 OVC110 520104 QNH2969INS TEMPO 0421/0503 21020G30KT 8000 -SHRA BKN065 OVC080 610905 520004 BECMG 0502/0503 21014KT 9999 NSW SCT065 BKN080 520103 QNH2971INS TX24/0421Z TN09/0411Z

NOTAMs

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