Brazilian submarine Almirante Karam

	Almirante Karam
History
Brazil
Name	Almirante Karam
Namesake	Admiral Alfredo Karam
Ordered	23 December 2008
Builder	ICN, Madeira Island, Itaguaí
Launched	26 November 2025
Sponsored by	Cármen Lúcia Antunes Rocha
Home port	Madeira Island
Identification	Pennant number: S43
Status	Sea trials
General characteristics
Class & type	Riachuelo-class submarine
Displacement	1,900 t (1,900 long tons)
Length	70.62 m (231 ft 8 in)
Beam	6.2 m (20 ft 4 in)
Draft	5.8 m (19 ft 0 in)
Propulsion	4 × MTU 12V 396 SE84 diesels 1,500 hp (1,119 kW) each; 1 × Jeumont-Schneider EPM Magtronic electric 3,909 hp (2,915 kW); 1 × Shaft; Exide Hagen batteries;
Speed	21 knots (39 km/h; 24 mph)
Test depth	400 m (1,300 ft)
Complement	32
Sensors &; processing systems	Naval Group SUBTICS combat management system; Thales TSM 2233 Eledone hull and flank array passive sonar; Thales Safare/S-Cube hull active sonar; Safran Series 20 target identification and classification system;
Electronic warfare; & decoys	Thales DR 3000/ITT AR 900 electronic support measures; Naval Group Contralto-S decoy launchers; CANTO anti-torpedo countermeasures;
Armament	6 × 533 mm (21 in) torpedo tubes:; 8 × SM39 Exocet anti-ship missiles; 18 × F21 heavy-weight torpedoes; 30 × naval mines;
Notes	Sources:

Almirante Karam (S43) —previously known as Angostura— is the fourth unit of the Riachuelo-class submarines built for the Brazilian Navy by ICN in Itaguaí, and DCNS, a modified design of the original French Scorpène class.

The Brazilian boats are larger in length, tonnage and cargo capacity compared to the original French project. The Brazilian version are 70.62 m (231 ft 8 in) and 1,900 tons, compared to the original Scorpènes that are 61.7 m (202 ft 5 in) and 1,565 tons. The submarine was launched on 26 November 2025, sponsored by Supreme Court justice, Cármen Lúcia Antunes Rocha.