The second group, or "Ayanami" class, were built in 1930 and 1931, and had larger bridges that encompassed the rangefinder, an azimuth compass sighting device and the gun-fire control room, as well as a range finding tower. Furthermore, the boiler room's air inlet was changed from a pipe to a bowl shape. They also benefited from the deployment of “Type B” turrets, which could elevate each gun separately to 75° for AA use, making them the world's first destroyers with this capability.