<page_title> Air-independent propulsion </page_title> <section_title> Non-nuclear AIP submarines </section_title> <table> <cell> Sweden <col_header> Country </col_header> </cell> <cell> Archer class <col_header> Country </col_header> </cell> <cell> Singapore <col_header> AIP type </col_header> </cell> <cell> 2 active / 2 planned. <col_header> Builders </col_header> </cell> <cell> Södermanland class <col_header> Country </col_header> </cell> <cell> 2 active / 4 planned <col_header> AIP type </col_header> </cell> </table>
Two are in service in Sweden as the Södermanland class, and two others are in service in Singapore as the Archer class.