The guns were able to elevate up to 75° to increase their ability against aircraft, but their slow rate of fire, slow traversing speed, and the lack of any sort of high-angle fire-control system meant that they were virtually useless as anti-aircraft guns.
Rising up to 75°, the guns were capable of improving their performance against aircraft; however, their low firing rate, slow rotation speed, and lack of a high-angle fire-control system made them nearly ineffective for anti-aircraft duties.