Editing Office of Naval Intelligence (section)

===Cold War===
While other parts of the Navy were downsized after the war, U.S. Fleet Admiral [[Chester Nimitz]] ensured ONI's continued strength, which was to prove important during the [[Cold War]]. Secretary of the Navy [[James Forrestal]] broadened ONI's mandate to include investigations of major criminal and security matters.<ref>{{cite web|title=1935-1945: Counterintelligence and Criminal Investigations|url=https://www.ncis.navy.mil/About-NCIS/History/Pages/1935-1945/|website=NCIS History|publisher=NCIS|access-date=27 April 2016}}</ref> In 1946, the Operational Intelligence Section was formed to provide fleet commanders with real-time analysis of the maritime activities and positions of foreign naval forces, namely the [[Soviet Navy]]. The Navy Field Operational Intelligence Office (NFOIO) was established in 1957 to provide more advanced [[signals intelligence]] and timely information on the intent of enemy forces.

ONI also made a concerted effort to enhance its technical and scientific resources, diversifying its personnel to reflect a wider range of expertise. The Navy Scientific and Technical Intelligence Center (NAVSTIC) was established in 1968 and shortly thereafter was folded into the Navy Reconnaissance and Technical Support Center (NRTSC). In response to the threat posed by nuclear-armed Soviet submarines, ONI developed the Sound Surveillance System (SOSUS) and the Ocean Surveillance Information system (OSIS), allowing the U.S. Navy to monitor and deter these threats.