Ginger is a natural anti-emetic. It stops you from throwing up. Soooo, if you get motion sickness, a slice of ginger steeped in boiling water for 10 minutes should make a drink that can help with motion sickness.
Drink an hour before you plan on the motion that will make you sick.
In emergency situations, the likelihood of being able to boil water is slim let alone the time to make the tea. But, keep it in your arsenal just in case.
This could be an alternative for hospice patients, such as those in Haiti where medicines are not available. This could help prevent throwing up in the hospice patients.