Balance between numbers of British destroyers and submarines owned by other major naval powers completely disturbed according to the Dutch magazine Marineblad dated 1938 no. 7

An item referred to the Proceedings dated October 1938 reporting when the First World War broke out The Royal British Navy more destroyers (230) possessed than the total number of submarines (191) in the whole world. Nowadays possessed England 149 destroyers and flotilla leaders (of which just 75 described as modern) and another 40 being built. The number of submarines in the world however was almost exploded. The USA, Russia, France, Italy and Germany possessed together 585 submarines!