 SMS Rostock was a light cruiser of the Karlsruhe class built by the German Kaiserliche Marine ( Imperial Navy ) . She had one sister ship , SMS Karlsruhe ; the ships were very similar to the previous Magdeburg @-@ class cruisers . The ship was laid down in 1911 , launched in November 1912 , and completed by February 1914 . Armed with twelve 10 @.@ 5 cm SK L / 45 guns , Rostock had a top speed of 28 @.@ 5 knots ( 52 @.@ 8 km / h ; 32 @.@ 8 mph ) and displaced 6 @,@ 191 t ( 6 @,@ 093 long tons ; 6 @,@ 824 short tons ) at full load . 
