| 21. | The heat and stress of the conning tower further weakened him.
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| 22. | But its conning tower was struck and ripped open, flooding and sinking it.
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| 23. | One shot struck the pressure hull just abaft the conning tower.
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| 24. | The conning tower was quite heavily armored, with side armor thick.
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| 25. | Her forward conning tower had thick sides and a thick roof.
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| 26. | A rangefinder was also added on top of the conning tower.
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| 27. | She settled by the bow until only the conning tower showed.
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| 28. | The submarine then submerged until only the conning tower was visible.
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| 29. | Her conning tower was armored with 4 in of steel plate.
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| 30. | The collision ripped open the conning tower and flooded the submarine.
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