Submarines
Return to Brazilian Navy Frigates
Riachuelo Class LOA 232′ /70.6 m TDISP 9,000 tons submerged (1 active, 4 building/ planned, 1 nuclear SSN possible)


Tupi Class (Type 209) LOA 201′ / 61.3 m TDISP 1,800 tons submerged (4 active starting in 1989 and 1 slightly larger variant boat Tikuna S-34)
Riachuelo S-22 (1977-1997) Oberon Class SS LOA 295′ / 89.9 m TDISP 2,400 tons submerged. 3 boats built for Brazil, both other boats scrapped. Museum boat at Rio de Janeiro. 