''Humaitá'' (S41) is a Brazilian ''Riachuelo''-class submarine built for the

Brazilian Navy ) , colors= Blue and white , colors_label= Colors , march= "Cisne Branco" ( en, "White Swan") (same name as training ship ''Cisne Branco'' , mascot= , equipment= 1 multipurpose aircraft carrier7 submarines6 frigates2 corvettes4 amphibious war ...

by ICN in Itaguaí, and DCNS. The Brazilian boats are larger in length, tonnage and cargo capacity compared to the original French project. The Brazilian version are and 1,900 tons, compared to the original Scorpènes that are and 1,565 tons.

Program history

In 2008, Brazil purchased four enlarged Scorpènes for

USD The United States dollar (symbol: $; code: USD; also abbreviated US$ or U.S. Dollar, to distinguish it from other dollar-denominated currencies; referred to as the dollar, U.S. dollar, American dollar, or colloquially buck) is the official ...

10 billion with a total technology transfer agreement and a second agreement to develop the first Brazilian nuclear-powered submarine, . The hull of ''Riachuelo'' was laid down at Cherbourg, France on 27 May 2010 and it was jumboized at the Brazilian Navy Shipyard in Itaguaí in late 2012. The first submarine ''Riachuelo'' was launched on 14 December 2018, and began

sea trial A sea trial is the testing phase of a watercraft (including boats, ships, and submarines). It is also referred to as a " shakedown cruise" by many naval personnel. It is usually the last phase of construction and takes place on open water, and ...

s in September 2019, the ''Humaitá'' was launched on 11 December 2020.

Development and design

The first stage of construction of the ''Humaitá'' took place in September 2013 in Brazil, at the headquarters of ICN in Itaguaí, with the cutting of the first steel plates of the structure. At this point, technology transfer from French technicians to Brazilians had already started. The other boats of the Brazilian class are ''Riachuelo'' (S40), ''Tonelero'' (S42) and ''Angostura'' (S43).

Namesake

''Humaitá'' is the fifth boat and the third submarine of the Brazilian Navy to receive this name, in honor of a

military operation A military operation is the coordinated military actions of a state, or a non-state actor, in response to a developing situation. These actions are designed as a military plan to resolve the situation in the state or actor's favor. Operations ma ...

, which took place in 1868, in the

Paraguayan War The Paraguayan War, also known as the War of the Triple Alliance, was a South American war that lasted from 1864 to 1870. It was fought between Paraguay and the Triple Alliance of Argentina, the Empire of Brazil, and Uruguay. It was the deadlies ...

. The other submarines were: *S ''Humaitá'' (S14) - Submarine of the , used in

World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposing ...

by the U.S. Navy, before being incorporated into the Brazilian Navy. (1957–1967) *S ''Humaitá'' (S20) - Submarine of the . (1973–1993)

References

Attack submarines Riachuelo-class submarine Ships built in Brazil 2020 ships Submarines of Brazil {{Submarine-stub