Aquanauts Vilem Kocian & Vladimir Geist return to the surface after 100 hours in UW habitat.
That is me, trying out the hard hat outfit. Czechoslovakia 1968
Lilburn Cave, California 1970
Devils Hole, Nevada 1969
40th Anniverary of underwater habitat experiment in flooded quarry in Czech Republic (back then it was Czechoslovakia).
Nick's "GRASSHOPPER" approaching Isthmus, Catalina Island, California
Aboard Nick's "GRASSHOPPER" , Catalina Island, California
Bendix job, Catalina 1974