 The ships were regarded as excellent sea boats by the German navy . The Derfflinger @-@ class ships were described as having had gentle motion , though they were " wet " at the casemate deck . The ships lost up to 65 % speed with the twin rudders hard over , and <unk> up to 11 degrees . This was greater than any of the preceding battlecruiser designs , and as a result , anti @-@ roll tanks were fitted to Derfflinger . The three ships had a <unk> height of 2 @.@ 60 m ( 8 ft 6 in ) . The standard crew for one of the vessels was 44 officers and 1 @,@ <unk> men ; when serving as the flagship for the I Scouting Group , the ships carried an additional 14 officers and 62 men . The <unk> carried smaller craft , including one picket boat , three barges , two launches , two <unk> , and two <unk> . 
