29C
Grindstone Air Harbor Airport
Grindstone Air Harbor Airport (29C) is a general-aviation airfield serving Port Austin, Michigan. The field lies at 640 ft (195 m) above sea level and has a single runway of 1,800 ft (549 m), grass. Its nearest neighbour is Engler Field (E53), 13 nm SSW.
Grindstone Air Harbor Airport is a smaller field, so Alārium does not attribute movements to it directly — but aircraft flying near it appear on the live map like any other, at their real altitude and on their real track.
Location
- Elevation
- 640 ft (195 m)
- Coordinates
- 44.0478, -82.9142
- Serving
- Port Austin
- Region
- Michigan
- Time zone
- America/Detroit
Runways1 · longest 1,800 ft
The diagram shows each runway’s orientation and relative length, read from its designator — runway 18 points 180° magnetic. Threshold coordinates are not published for this field, so strips are drawn about its centre rather than where they sit on the ground. It is a diagram, not a chart to navigate by.
| Runway | Length | Width | Surface | Lighting |
|---|---|---|---|---|
| 18/36 | 1,800 ft549 m | 85 ft | Grass | — |
Nearby airfields
Runway and field data from the OurAirports public-domain dataset. Positions are ADS-B, which covers most but not all aircraft.