| 41. | It has an underground gallery connecting to its neighbor, the Casemate de Rountzenheim Nord.
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| 42. | Casemate Barbonnet Sud was equipped with one FM machine gun and two automatic rifle positions.
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| 43. | This increased the available interior space and enabled a fully enclosed casemate-style fighting compartment.
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| 44. | It tore apart of the superstructure deck and disabled one of the port side casemate guns.
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| 45. | Howe led an attempted escape of two hundred prisoners from casemate # 5 in February 1864.
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| 46. | Their lower casemates had between and of armor, and their upper casemate had of armor.
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| 47. | The open cloister above the casemate, although decorative, was designed to dispel cannon smoke.
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| 48. | The conning tower and the casemate guns were also protected by 6 in of armor plating.
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| 49. | Also visible are her 15 cm casemate guns, before their removal to defend occupied Norway.
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| 50. | There was also an attempt to develop a casemate gun based on the M-60.
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