Singapore's first Invincible-class submarine has begun naval testing. Singapore bought two Invincible class “Type 218SG” submarines in 2014 for use in ocean patrol missions.

The platforms, built under the main contractor of Germany-based ThyssenKrupp Marine Systems, were developed based on the Type 214 submarine in line with the needs set by the Singapore Navy.

Equipped with an air-independent drive system, the submarine will be called the RSS Invincible. The crew of the platform also began training in Germany. The new submarines will replace the Challenger class and Archer-class submarines in the Singapore Navy inventory.

The first platform is intended to be delivered at the end of this year.