Grindstone Air Harbor Airport (Port Austin, MI) 29C 备注
| A57-36 | Controlling obstn exceeds A 45 deg slp. Approach ratio 20:1 ovr 25 ft pline, 720 ft dist, 125 ft L/R. |
| A57-18 | Controlling obstn exceeds A 45 deg slp. approach ratio 16:1 to threshold ovr +76 ft tree, 1244 ft dist, 42 ft L. Approach ratio 20:1 ovr 27 ft pline, 570 ft dist, 125 ft L/R. |
| A42-36 | 3 ft yellow cones. |
| A42-18 | 3 ft yellow cones. |
| A110-4 | Deer and large birds on and in vicinity of airport. |
| A110-3 | For clearance contact minneapolis artcc at 651-463-5588. |
