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
Palomares B-52 crash
1966 Palomares B-52 crash
USS Scorpion (SSN-589)