Amniotic Crew Containment

 is a module for your Locomotive.

Description
''London ingenuity colludes with the shapeling arts! Your crew will sleep like babes in these convenient amniotic sacs. In the event of a hull breach the sacs will expand to plug the gap, then harden to provide additional protection! Remove the crew first, though.''

Obtaining
 can be obtained by exchanging 19 Experimental Modifications at the Royal Society.