Singapore Ministry of Defence Signs Contract with TKMS for two new Type 218SG submarines

These submarines, together with the Archer-class submarines, will replace the ageing Challenger-class submarines. The Challenger-class submarines were built in the 1960s and will be progressively retired from service.

The replacement submarines will have significantly improved capabilities and be equipped with Air Independent Propulsion systems.

Update: Contacted by Navy Recognition, TKMS explained:
HDW Class 218SG is a customised design from ThyssenKrupp Marine Systems. The submarines, which will be fitted out with an air independent propulsion system, are going to be built at the Kiel premises of ThyssenKrupp Marine Systems.
Compared to the present ThyssenKrupp Marine Systems submarines, the new design has been customised to house additional equipment for present and future operational requirements. Special attention has also been paid to the ultra-modern layout of the tailor-made Combat System of these submarines. ST Electronics, being part of the ST Engineering group, will co-develop such Combat System with Atlas Elektronik GmbH.