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4.1
20 reviewsThe massive Type XXI was planned to replace the conventional ‘Atlantic’ U-boat that had seen service so far in the war. The Type XXIII was a smaller coastal version. The new Electo-U-boats were the first submarines to operate primarily submerged, as opposed to spending large periods of time on the surface. Hitler’s new designs utilized huge number of batteries to improve the time they could spend underwater, as much as several days, and only needed to surface to periscope depth for recharging via a schnorkel.
