Naval Intelligence Division
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| Agency overview | |
|---|---|
| Formed | 1882 |
| Preceding agency |
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| Dissolved | 1964 |
| Superseding agency | |
| Jurisdiction | Government of the United Kingdom |
| Headquarters | Admiralty Building Whitehall London |
| Parent agency | Admiralty |
The Naval Intelligence Division (NID), orginally known as the Naval Intelligence Department. was the intelligence arm of the British Admiralty before the establishment of a unified Defence Intelligence Staff in 1964. It dealt with matters concerning British naval plans, with the collection of naval intelligence. It was also known as "Room 39", after its room number at the Admiralty.
The Foreign Intelligence Committee was established in 1882 and it evolved into the Naval Intelligence Department in 1887.
The NID staff were originally responsible for fleet mobilisation and war plans as well as foreign intelligence collection; thus in the beginning there were originally two divisions: (1) intelligence (Foreign) and (2) Mobilisation. In 1900 another division, War, was added to deal with issues of strategy and defence, and in 1902 a fourth division, Trade, was created for matters related to the protection of merchant shipping. The Trade Division was abolished in October 1909 in the wake of the Committee of Imperial Defence inquiry into the feud between the First Sea Lord, Admiral Sir John Fisher and former Commander-in-Chief Channel Fleet, Admiral Lord Charles Beresford, when it was discovered that the captain heading the Trade Division had been supplying the latter with confidential information during the inquiry.
In 1910, the NID was shorn of its responsibility for war planning and strategy when the outgoing Fisher created the Navy War Council as a stop-gap remedy to criticisms emanating from the Beresford Inquiry that the Navy needed a naval staff—a role the NID had been in fact fulfilling since at least 1900, if not earlier. After this reorganisation, war planning and strategic matters were transferred to the newly created Naval Mobilisation Department and the NID reverted to the position it held prior to 1887—an intelligence collection and collation organisation.
During World War I the NID was responsible for the Royal Navy's highly successful cryptographic efforts, Room 40. The interception and decoding of the Zimmermann Telegram played a role in bringing the United States into the War. It has described as the most significant intelligence triumph for Britain during World War I, and one of the first occasions on which a piece of signals intelligence influenced world events.
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