during the war the ship's light anti-aircraft armament was augmented several times. in 1941, improved 2 cm c/38 guns replaced the original c/30 guns and three additional guns were added. the two guns on the aft shelter deck were replaced at some point by a single 2 cm quadruple "flakvierling" mount, probably in 1942. sometime in 1944–45, "steinbrinck" received the "barbara" anti-aircraft refit in which all of her existing 3.7 cm and most of her 2 cm guns were replaced. she retained her "flakvierling" mount and the remainder of her anti-aircraft armament now consisted of seven twin 3.7 cm sk m/42 mounts and four twin 2 cm mounts on the forecastle and side of the bridge.