Searle's first diving experience came in 1946 while serving in the destroyer
USS Meredith before transferring to the
USS Weiss where he was introduced to
Underwater Demolition Team techniques. Searle then trained at the Naval School of Diving and Salvage at the
Washington Navy Yard, where he became a deep-sea
helium-oxygen diving officer. Searle then served two years as Chief Engineer on the
USS Providence before attending the Command and Staff Course of the
Naval War College in
Newport, Rhode Island, in 1961. Speaking on the H-bomb recovery, Searle noted that "When you think about what we did, it had never been done before". In 1968, Searle co-authored the first National Oil and Hazardous Materials Pollution Contingency Plan. Searle participated in
SEALAB III, working with Dr.
John Piña Craven, the U.S. Navy's head of the
Deep Submergence Systems Project. The
Legion of Merit was awarded to Searle on February 24, 1970, by RADM Maurice H. Rindskopf with a citation that states "... CAPT Searle contributed more than any other individual since World War II to the high state of readiness which now exists in the Navy's salvage and diving organization.". ==Civilian career==