The first naval conference in Geneva was a meeting of the United States, the United Kingdom and Japan (France and Italy refused to continue negotiations) that Calvin Coolidge had convened in 1927. The purpose of the conference was to extend the shipbuilding limits agreed in the Washington Treaty. The Washington Treaty had limited the construction of battleships and aircraft carriers, but had not limited the construction of cruisers, destroyers or submarines.  The British proposed limiting battleships from 15 inches to less than 30,000 tonnes. The conference ended without agreement.  The second naval conference in Geneva, in 1932, also ended without agreement, after the nations had been blocked because of germany`s rearmament.  The first treaty was the Washington Naval Treaty, signed in 1922, and the five world naval powers agreed to abide by strict restrictions on the construction of battleships and battlecruregators, in order to avoid a naval arms race as before World War I. The treaty limited the number of main vessels owned by each signatory as well as the total tonnage of each navy`s battleships. New vessels could only be built to replace the surviving vessels, as they retired after 20 years of service. In addition, any new vessel would be limited to 16-inch guns and a displacement of 35,000 tons. (f) However, for submarines, Germany, although not exceeding the 35:100 ratio for total tonnage, is entitled to own a submarine in tonnage equivalent to the total tonnage of submarines owned by members of the Commonwealth of Nations.
However, the German government undertakes not to exceed 45% of the tonnage of German submarine, except in the circumstances mentioned in the following rate immediately. the sum of the members of the Commonwealth of British Nations. The German government reserves the right to use its right to a percentage of the tonnage of submarines in case of vigilance, which it believes makes use of Germany, at 45%. To share this with Her Majesty`s Government in the United Kingdom, and consent that the matter will be discussed in a friendly manner before the German government can use this right. All sea vessels with a length of 24 m or more must have an International Tonnage Certificate 1969 (ITC 69), a length of less than 24 metres and a tonnage certificate (national). The length must be measured in accordance with Article 2, paragraph 8, of the International Convention on Ship Tonnage Gauge, 1969 – (ITC). Please read our additional information on this international measurement method. In November 1934, the Germans formally informed the United Kingdom of their desire to obtain a contract with the United Kingdom, which allowed the Reich Navy to grow up to 35% of the Royal Navy.