The launch of Singapore’s final Invincible-class submarine on April 22 marked a new era in the Republic’s submarine journey. Here is a closer look at the evolution of the Republic of Singapore ...

The country's fifth and sixth submarines, the Invincible and ... and join older Archer- and Challenger-class boats. Sign up here. They represent a technological step forward for Singapore's ...

“These new four Invincible-class submarines will increase considerably ... “They will replace the Challenger and Archer submarines that are now more than 60 years and 40 years old respectively.” ...

The RSN currently has four Swedish-made vessels from two classes of submarines, the Challenger-class and Archer-class. The two existing Challenger-class submarines are expected to be retired in ...

The submarine will ... Given that the Archer and Challenger classes have submerged endurances of between 14 and 21 days respectively, this puts the Independence class’s endurance at about ...