 Admiral Scheer underwent a refit while her sister ships set out on commerce raiding operations in the Atlantic . Admiral Scheer was modified during the early months of 1940 , including the installation of a new , raked clipper bow . The heavy command tower was replaced with a lighter structure , and she was reclassified as a heavy cruiser . Additional anti @-@ aircraft guns were also installed , along with updated radar equipment . On 19 – 20 July RAF bombers attacked Admiral Scheer and the battleship Tirpitz , though they failed to score any hits . On 27 July , the ship was pronounced ready for service . 
