The Navy suspected possible failure and launched a search, but "Scorpion" and her crew were declared "presumed lost" on 5 June. Her name was struck from the Naval Vessel Register on 30 June. The search continued with a team of mathematical consultants led by Dr. John Piña Craven, the chief scientist of the Navy's Special Projects Division. They employed the methods of Bayesian search theory, initially developed during the search for a hydrogen bomb lost off the coast of Palomares, Spain, in January 1966 in the Palomares B-52 crash.