![MD 639HM silhouette flying over power lines with snow falling.](https://flightsafety.org/wp-content/uploads/2019/10/helicoptersafety_oct19_featured2comp.jpg)
Citing the persistence of helicopter accidents linked to pilot spatial disorientation, the U.S. Helicopter Safety Team (USHST) is proposing more training that simulates flying in a lack of visibility and emphasizes recovery techniques in case of inadvertent entry into instrument meteorological conditions (IMC).