Saab has received an order from the Swedish Defence Material Administration (FMV) to add new capabilities to the new A26 Blekinge class submarines.
The latest contract, which also supports the ongoing development and manufacture of the vessels, is valued at Skr5.2bn ($597m).
In June 2015, the FMV awarded a contract to Saab for the construction, verification and delivery of two A26 submarines.
The first submarine’s first steel was cut at Saab’s Kockums shipyard in September 2015.
Saab president and CEO Micael Johansson said: “Saab is currently constructing the world’s most advanced conventional submarine.
“The new capabilities that are to be added to the A26 will give an additional edge within the weapon system and stealth technology among other things.
“With support from Saab’s skilled employees and investments, the important industrial submarine capability in Sweden has been restored.”
According to Saab, delivery of the two submarines is expected to happen in 2027 and 2028.
The Type A26 submarines will serve as successors to the Swedish Navy’s Gotland-class submarines.
The new boats will feature conventional diesel-electric propulsion machinery and equipped with the Kockums Stirling air-independent propulsion (AIP) system, as well as Multi Mission Portal.
The vessels will be built to perform a wide range of missions, such as maritime security, covert mine countermeasure, intelligence gathering, surveillance and reconnaissance (ISR), anti-submarine warfare (ASW), anti-surface warfare, and many other special operations.
In 2018, Australian shipbuilding company ASC collaborated with Saab to support the Royal Swedish Navy’s A26 submarine programme.