POSTWAR ALLIED EVALUATIONS – TYPE XXI

Thus the Germans produced three revolutions in submarine performance virtually simultaneously: the snorkel, the 15-17-knot ‘electric’ submarine (Types XXI and XXIII), and the 25-knot Walter boat. In 1948 the US evaluation was that World War II ASW developments had essentially solved the non-snorkel submarine problem; for example, the ‘fleet type’ could expect to exchange 2 […]

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