What’s the number one complaint for U.S. Navy Aircrew? Surprisingly enough, one of the top issues for Naval aircrew is lower back pain – something to which most of us can relate. But in the US military, lower back pain is linked to motion sickness and for military pilots, that can lead to life and death situations. More than a quarter of all fatal military flight accidents are caused by spatial disorientation— commonly known as motion sickness— which on average claims dozens of lives every year. What many do not know is that it also takes a heavy toll on civilians. Experts estimate that 5-10% of all general aviation accidents are caused by spatial disorientation, and of those accidents, nearly 90% are fatal.