How The Ocean Works on Instagram: "Operation Wahoo was an underwater nuclear test conducted by the United States on May 16, 1958, as part of Operation Hardtack I in the Pacific Proving Grounds at Enewetak Atoll. The device, with a yield of about 9 kilotons, was detonated at a depth of roughly 500 feet (150 meters) underwater. The purpose of Wahoo was to study how nuclear explosions behaved at significant depths—specifically how shock waves, water plumes, and surface disturbances could affect nav