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.
The guns could elevate up to 75° to boost their capability against aircraft, but due to their slow rate of fire, sluggish turning ability, and absence of any high-angle fire-control system, they were rendered almost useless as anti-aircraft weapons.