A conversation with Peter Girguis, chair of the Deep Submergence Science Committee (DESSC), and Chris German, chief scientist for the National Deep Submergence Facility (NDSF) at Woods Hole Oceanographic Institution (WHOI).

After a major rebuild of the nation’s only deep-sea research submarine, leaders of the upgrade project made an unconventional decision—organize an expedition of veteran Alvin users from many research fields and institutions to test the new sub and help its transition back into service for the nation’s scientific community. (Produced by Chris Linder, Woods Hole Oceanographic Institution)