Office of Naval Intelligence

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Overview

The Office of Naval Intelligence is the intelligence service of the United States Navy and the oldest continuously operating intelligence service of the United States Government. ONI is responsible for the provision of maritime, naval, and naval-adjacent foreign intelligence to the Navy, the Department of Defense, and the broader Intelligence Community, and for support to United States naval operations.¹

ONI is one of the four service-intelligence components of the Department of Defense — alongside Army Military Intelligence (G-2/INSCOM), Air Force Intelligence (16th Air Force/ISR), and Marine Corps Intelligence — and is a member of the United States Intelligence Community in that capacity.

History & Origins

ONI was established by General Order No. 292 of 23 March 1882, signed by Secretary of the Navy William H. Hunt, which directed the establishment of an Office of Intelligence within the Bureau of Navigation of the Navy Department for the purpose of "collecting and recording such naval information as may be useful to the Department in time of war, as well as in peace." The first head of the office, Lieutenant Theodorus Bailey Myers Mason, was assigned three subordinate officers and the use of two rooms at the Navy Department building. ONI is the oldest continuously operating intelligence service of the United States Government and predates the Office of Strategic Services, the Central Intelligence Agency, and the National Security Agency by between sixty and seventy years.²

ONI's nineteenth-century origin reflected the broader Navy modernisation programme of the 1880s — the construction of the steel "New Navy" cruisers and battleships that displaced the post-Civil-War wooden fleet — and the recognition that the new programme required sustained intelligence on the technical capabilities of foreign navies. ONI's principal early work was the systematic collection, from open sources and from the reports of US naval attachés, of technical and order-of-battle data on foreign fleets.³

ONI's substantive role in the World War II United States naval signals-intelligence effort was secondary to that of the Office of the Chief of Naval Operations' communications-security section (OP-20-G), which conducted the cryptanalytic work on Japanese naval cipher systems — most consequentially the breaking of JN-25 that contributed to the United States Navy's strategic-warning success at the Battle of Midway in June 1942. The cryptanalyst Joseph J. Rochefort, who led the Pacific Fleet's Combat Intelligence Unit (Station HYPO) at Pearl Harbor, was the principal figure in the Midway intelligence success, though the institutional credit was contested in the immediate post-war period.⁴

Mandate & Jurisdiction

ONI's authorities derive from the National Security Act of 1947 (as amended), Department of Defense Directive 5105.21 (governing service-intelligence components), the relevant Department of the Navy regulations, Executive Order 12333, and the Intelligence Community Directives applicable to service-intelligence components. ONI's principal functions are:

• production of maritime and naval foreign-intelligence analysis for the Chief of Naval Operations, the Secretary of the Navy, and the broader Intelligence Community;
• support to United States naval operations through the National Maritime Intelligence-Integration Office (NMIO) and through subordinate operational-support detachments;
• collection of human, signals, and technical intelligence on foreign navies, foreign maritime activity, and foreign-fleet capabilities;
• counter-intelligence support to the Department of the Navy, conducted in coordination with the Naval Criminal Investigative Service (NCIS) and the Federal Bureau of Investigation;
• production and dissemination of unclassified maritime-domain-awareness product — principally the Worldwide Threat to Shipping (WTS) report and the Piracy Analysis and Warning Weekly (PAWW) — covering commercial shipping, fisheries, and maritime law-enforcement matters.⁵

ONI is co-located with the Coast Guard Intelligence Coordination Center, the Marine Corps Intelligence Activity, and the National Maritime Intelligence-Integration Office at the National Maritime Intelligence Center, Suitland, Maryland.

Notable Operations

Confirmed Pacific signals intelligence and the Battle of Midway (1942). The breaking of JN-25 by the joint OP-20-G / Station HYPO / Station NEGAT effort across the spring of 1942 — and the use of the resulting decrypts to establish that the Japanese designation "AF" referred to Midway Atoll — provided the United States Pacific Fleet with the strategic warning that allowed Admiral Chester W. Nimitz to deploy the available US carrier force to engage the Japanese strike group on advantageous terms. The June 1942 Midway engagement is treated in the principal accounts as the case-study example of a strategic-warning success.⁶

Confirmed Cold War Soviet-submarine tracking. ONI conducted, in cooperation with the Sound Surveillance System (SOSUS) and with the substantial signals-intelligence collection of the Naval Security Group, the United States Government's principal continuing tracking of Soviet ballistic-missile and attack submarines across the post-1960 period. The tracking activity is the institutional ancestor of contemporary maritime-domain-awareness work.⁷

Confirmed Cuban Missile Crisis maritime quarantine intelligence (1962). ONI provided the maritime-traffic and Soviet-shipping analysis that supported the United States Navy's enforcement of the maritime quarantine of Cuba during the October 1962 crisis. The work integrated with the imagery analysis conducted by NPIC; the quarantine line was modified across the crisis on the basis of ONI assessments of Soviet vessel positions and likely cargo.⁸

Confirmed Anti-piracy operations off the Horn of Africa (2008–present). ONI has, from approximately 2008 onward, conducted the maritime-domain-awareness analysis that supports the Combined Maritime Forces and Combined Task Force 151 anti-piracy operations off Somalia and the Bab-el-Mandeb. ONI's unclassified Worldwide Threat to Shipping reports and Piracy Analysis and Warning Weekly bulletins are a substantial component of this output.⁹

Confirmed Counter-narcotics maritime intelligence support. ONI's Office of Operational Intelligence supports Joint Interagency Task Force South (JIATF-S), the principal United States Government effort against maritime narcotics-trafficking in the Eastern Pacific and Caribbean transit zones. JIATF-S is one of the principal continuing applications of military maritime intelligence to a law-enforcement mission.¹⁰

Controversies & Abuses

Confirmed Walker spy ring (1967–1985). Chief Warrant Officer John Anthony Walker, a Navy communications watch officer, supplied US Navy cryptographic key-list material to the Soviet KGB from October 1967 to his arrest in May 1985, recruiting his brother (Lieutenant Commander Arthur Walker) and his son (Yeoman Michael Walker) into the operation. The ring exposed substantial Navy communications-security material to Soviet exploitation. The case is one of the most damaging single counter-intelligence failures in the post-war history of the Department of the Navy. Walker was arrested by the FBI on 20 May 1985 and was sentenced to life imprisonment.¹¹

Confirmed Edwin P. Wilson case (1976–1983). Former CIA officer and former ONI operative Edwin P. Wilson — who served with Office of Naval Intelligence Task Force 157 from 1971 to 1976 — supplied explosives and other military equipment to Libya after his departure from government service. The case produced sustained controversy over the operational relationships between US intelligence and former officers, and produced multiple federal prosecutions across the early 1980s. The case produced sustained controversy over the operational relationships between US intelligence and former officers, and produced multiple federal prosecutions across the early 1980s. Wilson's principal conviction for selling C-4 explosives to Libya was vacated in 2003 on prosecutorial-misconduct grounds (United States v. Wilson, 289 F. Supp. 2d 801 (S.D. Tex. 2003)).¹²

Confirmed Jonathan Pollard espionage case (1984–1985). Jonathan Jay Pollard, a civilian intelligence analyst employed at the Naval Investigative Service Anti-Terrorist Alert Center and subsequently assigned to the Naval Intelligence Command's Threat Analysis Division, passed classified intelligence to Israel across 1984–1985. Pollard was arrested on 21 November 1985 outside the Israeli embassy in Washington DC, where he had sought asylum. He was sentenced on 4 March 1987 to life imprisonment — the most severe sentence imposed in a US espionage case in the post-war period not involving the death penalty. He was paroled on 20 November 2015. The Pollard case is the most consequential in-house counter-intelligence failure in the institutional history of the Office of Naval Intelligence.¹³

Notable Figures

• Lieutenant Theodorus Bailey Myers Mason — First head of ONI (1882–1885); founder of the office.
• Captain Joseph J. Rochefort — Officer-in-charge, Station HYPO Combat Intelligence Unit (1941–1942); principal figure in the Midway intelligence success.
• Vice Admiral Rufus L. Taylor — Director (1963–1966); subsequent Deputy Director of Central Intelligence.
• Vice Admiral Bobby R. Inman — Director (1974–1976); subsequent Director of NSA and Deputy Director of Central Intelligence.
• Vice Admiral William O. Studeman — Director (1985–1988); subsequent Director of NSA.
• Rear Admiral Mike Studeman — Commander, ONI (Aug 2022 – Jul 2023).
• Rear Admiral Mike Brookes — Commander, ONI (2023–present).
• Vice Admiral Karl O. Thomas — Director of Naval Intelligence / OPNAV N2N6 (2024–present). (Note: since the early 2010s reorganisation of OPNAV, the Director of Naval Intelligence staff title and the Commander, ONI command are separately held positions.)

Oversight & Accountability

ONI is subject to oversight by the Senate Select Committee on Intelligence, the House Permanent Select Committee on Intelligence, the Senate and House Armed Services Committees, the Department of the Navy Inspector General, the Department of Defense Inspector General, and the Intelligence Community Inspector General. As a service-intelligence component, ONI's intelligence functions are subject to the Intelligence Community Directives issued by the Director of National Intelligence.

Sources & Further Reading

1. ONI, "History"; ONI, "About".
2. Jeffery M. Dorwart, The Office of Naval Intelligence: The Birth of America's First Intelligence Agency, 1865–1918 (Naval Institute Press, 1979); ONI Heritage; General Order No. 292, 23 March 1882.
3. Dorwart, The Office of Naval Intelligence; Wyman H. Packard, A Century of U.S. Naval Intelligence (Office of Naval Intelligence, 1996).
4. Elliot Carlson, Joe Rochefort's War: The Odyssey of the Codebreaker Who Outwitted Yamamoto at Midway (Naval Institute Press, 2011); Frederick D. Parker, A Priceless Advantage: U.S. Navy Communications Intelligence and the Battles of Coral Sea, Midway, and the Aleutians (Center for Cryptologic History, NSA, 1993).
5. Department of Defense Directive 5105.21, "Defense Intelligence Agency"; Executive Order 12333, as amended; ONI Mission statement.
6. Carlson, Joe Rochefort's War; Parker, A Priceless Advantage; Gordon W. Prange, Miracle at Midway (McGraw-Hill, 1982).
7. Sherry Sontag and Christopher Drew, Blind Man's Bluff: The Untold Story of American Submarine Espionage (PublicAffairs, 1998).
8. Norman Polmar and John D. Gresham, DEFCON-2: Standing on the Brink of Nuclear War During the Cuban Missile Crisis (Wiley, 2006); National Security Archive, Cuban Missile Crisis Project.
9. ONI Products — Worldwide Threat to Shipping (WTS) and Piracy Analysis and Warning Weekly (PAWW); Combined Maritime Forces, public reporting.
10. JIATF-South, "About".
11. Pete Earley, Family of Spies: Inside the John Walker Spy Ring (Bantam, 1988); FBI Vault, John Walker file.
12. Peter Maas, Manhunt: The Incredible Pursuit of a CIA Agent Turned Terrorist (Random House, 1986); United States v. Wilson, 750 F.2d 7 (2d Cir. 1984); United States v. Wilson, 289 F. Supp. 2d 801 (S.D. Tex. 2003) (vacating principal conviction on prosecutorial-misconduct grounds).
13. Seymour M. Hersh, "The Traitor," The New Yorker, 18 January 1999; FBI Vault, Jonathan Pollard file; Wolf Blitzer, Territory of Lies (Harper & Row, 1989); National Security Archive, Jonathan Pollard: Revisiting a Still Sensitive Case (NSAEBB 407, 2012 release).