The documentary is called Hitler's Lost Sub and can be purchased on Amazon right along with Gentile's book...probably on the same page
![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
There have been alot of very heated threads comparing Gentile's book with Shadow Divers. That may be why you haven't had alot of replies to this thread and I too will opt out of comment unless some of the Gentile proponents show up with their ridiculous comments/baseless accusations
![Big Grin :D :D](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
I know of one thread that was even pulled by Doc due to it's content of viscious name calling and accusations. Do a search and you can find several threads.
There is a thread titled reel versus no reel...something like that in the wreck diving sub forum, wreck exploration...It seems there are not very many proponents of progressive penetration. I would venture to say it's probably an 80/20 for/against.