Seat belt buckles
Underwatertrainer.
I remember the seat belts fitted in the North Sea Puma fleet having the buckle inboard with reference to the aisle. Although I do not have any idea as to why this was, perhaps from the fact that having the buckles on the window side affected egress?
The two point, or latterly the 4 point harness (with the high seat back) was the same, buckles fitted to the aisle side.
Perhaps someone can tell us the real reason for this.