Hi submadmans - This is the 50,05 Dollar study of a Uboat esacpe system
for small hatches. 50 Dollar for the old scuba diver bouancy device -
and 5 cent for the supermarket-storebag. No building cost. 

The bag should be on the real thing much stronger, little bigger and
made from clear material. 

Warning this file contains information which can safe your life.. or
kill you. Never use it for other porpose than it was designed for..
Keep at away from children.. it just a study.. 

regards Carsten