What do a shark, coffin and ice cream cone have in common? They’re all student-built, human-powered submarines—and they competed in the 14th biennial International Submarine Races (ISR), recently held at the Naval Surface Warfare Center (NSWC) Carderock Division, in Bethesda, Maryland. ISR—co-hosted by the Office of Naval Research (ONR), NSWC Carderock and the Naval Sea System Command’s Team Submarine —is…