Tapajó (S33) was the fourth boat of the Tupi-class submarine of the Brazilian Navy.

[3][4] The boat was built at Arsenal de Marinha do Rio de Janeiro in Rio de Janeiro and was launched on 5 June 1998 and commissioned on 21 December 1999.

[citation needed] She was decommissioned in 11 August 2023, after 25 years of active service.

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