If it was possible to attach a line, then it would be equally possible to attach a strong enough cable to support some weight. Then you could have a pre-rigged 5" shell ride the line down. This would almost certainly blow a hole in the pressure hull, and you would win the submarine war overnight.
Until I see some real evidence, I'll modify my 'fishy' statement: it sounds like BS to me.
__________________
“Never do anything you can't take back.”
—Rocky Russo
|