Germans rushed the technological marvel into production late in the war. The type xxi were revolutionary submarines, concentrating many innovations to revert the battle of the atlantic, but they arrived too late. These submarines were the first submarines designed to operate primarily submerged, rather than spending most of their time on the surface and only submerging for brief. Electric boats), were the first submarines designed to operate primarily submerged, rather than as surface ships that could submerge as a means to escape detection or launch an attack The key improvement in the type xxi was greatly increased battery capacity, roughly triple the type viic This gave these boats great underwater range.
A few home ports will also be used, since the norwegian bases have insufficient accommodation, and operational possibilities will thus be limited. The submarine became the first to operate faster under water than on it and opened the doors to a new chapter in submarine warfare and design.
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