U-boat VII C design plans

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Submarine Blueprint — Blue, Detailed

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Submarine Blueprint

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U-boat VII B technical diagram

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U-boat XXI Design

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U-boat Type VII C 1944 general plan

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U-boat Type IX D2 general plan

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Diagram of UC-5 submarine

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U-boat Technical Blueprint — Blue

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German submarine crew on deck

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Uboottyp XXI general plan

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U-995 submarine on display

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