VX275,
I am intrigued by your comment about turnstiles on the para doors on the 'J'. Can you add a little more information ?. I did 30 years on the 'K' and para crossover was a problem that was never solved. In theory staggering the exits would seem to be the correct solution but in the real world of the organised mayhem that is an operational para drop it des not work. Once the 'train ' starts it is very difficult to control as the paras only ambition is to get out of the 'honk box' and to get the weight off his legs. Any form of staggering slows up the rate of exit from the a/c so you need bigger DZs especially with door bundles and Wedge At the conferences I attended I always got the impression that it concerned the RAF far more than the army who regarded it as a reasonable risk taken as an overall part of para ops.