|Laid down:||26 October 1962|
|Launched:||14 June 1965|
|Commissioned:||24 February 1966|
|Decommissioned:||10 January 1991|
|General characteristics |
|Class and type:||Dolfijn-class submarine|
|Length:||78.3 m (256 ft 11 in)|
|Beam:||7.8 m (25 ft 7 in)|
|Draught:||5 m (16 ft 5 in)|
While on exercise northwest of Ireland, she received the news that the submarine Walrus had gone missing. Tonijn participated in the search for the boat on 16 December 1968. It turned out Walrus was not lost but had lost radio contact due to a malfunction. From 18 to 28 July 1976 Tonijn made a visit to Kiel to participate in the Kieler Woche. Later that year she visited Dublin from 11 to 14 September.
In September 1979 after fires broke out in the port engine room and starboard engine room USS Harlan County assisted in towing the boat to Gibraltar. The boat was in serious trouble as she also suffered from battery depletion that was performed at the time the fires broke out leaving the boat with 10% battery power.
On 16 October a refit of the boat began at a dry-docked in Rotterdam. This lasted until 11 December 1979. In 1984 the boat participated in an exercise at Zeebrugge with HNLMS Van Speijk and the Belgian frigate Wielingen. The boat made a trip to Norway in 1990 and later that year to Scotland.
- "Dutch Submarines: The Dolfijn submarine class". dutchsubmarines.com. 2012. Retrieved 24 September 2013.
- "Dutch Submarines: The submarine Tonijn". dutchsubmarines.com. 2012. Retrieved 24 September 2013.