This British Royal Air Force Emergency Flying Ration MK 9 is the pinnacle in survival ration quality and design. The Emergency Flying Ration MK has been in service for over 75 years - making it one of the longest running rations still produced. It has gone through extensive changes over the decades, and the MK 9 has been in service since the early 1980's.br br Huge Thanks to mrezone for making this review happen.