The later treaty still allowed unlimited qualifying ships while simplifying their restrictions. It retained the 20-knot ceiling and torpedo prohibition but removed the earlier limit of four guns above three inches. A practical escort could therefore mount three twin four-inch gun turrets, light anti-aircraft weapons, depth charges, ASDIC, and later radar. Existing Egret, Bittern, and emerging Black Swan designs showed that the necessary ship concepts were already available.
Chapter · 15:15-16:49
The 1936 treaty widened sloop armament options
The 1936 rules retained the 20-knot and no-torpedo conditions but removed the earlier four-gun restriction, enabling heavily armed escort designs.