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