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Grand Lake St Marys Seaplane Base Seaplane Base
O12 · St Marys, OH · 871 ft elevation · Towered
Airport information
- FAA LID
- O12
- Coordinates
- 40.5410, -84.4907
- Elevation
- 871 ft MSL
- Sectional chart
- DETROIT
- Airport use
- Public
- Control tower
- Yes
- ARTCC
- INDIANAPOLIS (ZID)
- Flight service (FSS)
- DAYTON
- NOTAM facility
- DAY
- Attendance
- APR-NOV ALL 0800-1700
- Segmented circle
- No
- Activated
- 1995/04
- Distance from city
- 5 NE
Weather
METAR observed
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TAF forecast
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Sun & FAA night 2026-06-20
| Event | Local (EDT) | UTC |
|---|---|---|
| Morning civil twilight Loggable night ends | 05:34 AM | 09:34Z |
| Sunrise | 06:07 AM | 10:07Z |
| Sunset | 09:12 PM | 01:12Z |
| Evening civil twilight Loggable night begins | 09:45 PM | 01:45Z |
Loggable night (§1.1)
09:45 PM → 05:34 AM
Night currency (§61.57)
10:12 PM → 05:07 AM
Plan a flight from O12
Runway 09/27
7,000 ft × 4000 ft · WATER 09
- Heading
- n/a
27
- Heading
- n/a
Headings shown are true (magnetic variation unavailable).
Nearby navigation aids
| NavAid | Type | Freq | Radial / Dist magnetic |
|---|---|---|---|
| ROD · Rosewood | VORTAC | 117.50 | r312° / 25.5 NM |
| AOH · Allen Co | VOR | 108.40 | r251° / 25.8 NM |
| DQN · Dayton | VOR-DME | 114.50 | r353° / 31.8 NM |
Chart Supplement FAA A/FD
Open PDF ↗Preview Chart Supplement
VFR sectional
Services
- Fuel available
- 100LL
Ownership & management
Owner
OHIO DIV OF PARKS & REC
834 EDGEWATER DR, SAINT MARYS, OH
419-394-3611
Manager
DAVID FALER, ASST PARK MGR
GRAND LAKE SAINT MARYS STATE PARK, 834 EDGEWATER DR, SAINT MARYS, OH
419-394-3611
Remarks FAA
- PRVDD 20:1 APCH; OIL WELL TO THE S MKD & LGTD; SEA LANES MKD & LGTD PER AC 150/5395-1.
- 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.
- ACFT OPRG AT GRAND LAKE ST MARYS SHOULD MNT TFC ON LAKEFIELD CTAF & NEIL ARMSTRONG CTAF.
- ARPT CLSD NOV 15 TO APR 1 & MEMORIAL & LABOR DAY.
- CELL 419-656-7060.
- 100LL AVBL ON REQ, PPR, CTC KOZY MARINA 419-394-8797.
Nearby airports
Weather is live from the Aviation Weather Center; airport facility data is from the FAA NASR (28-day cycle). For planning and education only; always verify against official sources. Open O12 in a full tool: METAR/TAF decoder, crosswind calculator, sun & night times, or the density altitude calculator.