In the Chinook, we orientate one arm towards our nearest exit and place it on our opposite shoulder resting our head in the 'v' created by the elbow.
Our other hand goes underneath the thighs and grips the front of the seat. This brace position is very good for heavy emergency landings and vertical g-loading to protect the spine and neck.
The orientation arm means that if the lights fail or we roll, we only need extend the arm which then points us toward our exit and helps alleviate disorientation.
If we find ourselves out of a seat, the idea would be to lie prone on the floor. Just a bit of gen from the RAF
