Challenger-class submarines, formerly the Royal Swedish Navy’s Sjoormen-class, joined the RSN in the 1990s. The then-deputy prime minister and minister for defence Dr Tony Tan Keng Yam ...

Between 1995 and 1997, the RSN bought four Sjoormen-class submarines from the Swedes, refurbished them and renamed them the Challenger class. These 51m-long subs were built for the Royal Swedish ...

Sweden’s Sjöormen-class Submarines Proved Cost-Effective – During the Cold War, Sweden maintained a policy of neutrality that included developing the means to ensure its independence and ...

[[nid:702715]] Previously Royal Swedish Navy Sjoormen-class submarines, the Challenger-class submarines entered service with the Singapore Navy in the 1990s. RSS Conqueror and RSS Chieftain were ...

Between 1995 and 1997, the RSN bought four Swedish Sjoormen-class submarines. They were renamed as the Challenger-class and commissioned in the 2000s. "Those submarines have been workforces of the ...

RSN began its submarine development with the acquisition of its first Sjoormen-class submarine from Sweden in 1995. The second-hand boats were relaunched as the Challenger-class from 1997.

The history of Singapore’s submarine program dates back to the mid-1990s, when the RSN bought four Sjoormen-class submarines from Sweden, which it refurbished and renamed the Challenger class.