Of its capital ships only Prinz Eugen survived, sheltering at Copenhagen; only the U-Boat Arm was capable of continuing the fight. The Kriegsmarine had approximately 470 U-boats remaining. Some 170 of these were operational U-boats (Front boats), based mainly in occupied Norway, and another 200 home-based boats in various stages of building, commissioning and working up; these were mainly in the north German ports and on the Baltic.