Hoffman's Black Mountain Aerodrome Airport (Cheboygan, MI) 2M7 备注
| A57-33 | Approach ratio 20:1 to dthr ovr +88 ft trees, 1774 ft dist, 0 ft B. |
| A57-15 | Controlling obstn exceeds A 45 deg slp. |
| A52-33 | Also + 17 ft road, 43 ft distance, 125 ft R. |
| A42-15 | Runway 15/33 marked with 3 ft yellow cones. |
| A33-15/33 | Runway 15/33 soft when wet. please call 231-627-2418 to cfm runway conds. Runway rough, uneven, tire ruts. |
| A110-2 | For clearance contact minneapolis artcc at 651-463-5588. |
| A110-1 | Runway 15/33 ditch on both sides of runway. |
