during the war the ship's light anti-aircraft armament was augmented several times. in april 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 mount, probably in 1942. sometime in 1944–45, "z14 friedrich ihn" received a partial "barbara" anti-aircraft refit where twin 2 cm mounts replaced her singles, giving her a total of eighteen 2 cm barrels.