10 December 1977
18 November 1971
| 18 November 1971|
22 November 1972
| Given a mid-life modernisation in 1995 by the company HDW/FERROSTAL|
2,030 long tons (2,060 t) surfaced
2,410 long tons (2,450 t) submerged
Vickers-Armstrongs, Vickers Shipbuilding and Engineering
Tonelero (S21) was an Oberon-class submarine in the Brazilian Navy.
Brazilian submarine Tonelero (S21) Wikipedia
The submarine, built by Vickers Shipbuilding and Engineering at their shipyard in Barrow, was laid down on 18 November 1971, and launched on 22 November 1972. During construction, a fire seriously damaged the submarine. The submarine was towed to Chatham Dockyard, where the 60-foot (18 m) central section was cut out and replaced. The fire was found to have originated in the cabling, and prompted the recabling of all under-construction Oberons. She was commissioned into the Brazilian Navy on 10 December 1977.
Tonelero was listed as active in the 1998-99 edition of Jane's Fighting Ships.