Zumwalt's originally planned 57 mm secondary guns are linked to expected Chinese small missile craft and gunboats. Alert sensors, lookouts and suitable guns provide a response to this familiar class of threat. Saturation can still let attackers through, and predictable positions in the confined Black Sea add difficulties. Type 31's 57 mm gun and two 40 mm guns are assessed favourably against small craft and drones. A preference for three 76 mm mounts is explicitly a personal alternative.
Notable Point · 1:10:42-1:13:16
Zumwalt and Type 31 gun choices against small craft
Small-boat threats explain the proposed Zumwalt secondary battery and the value assigned to Type 31's guns.