Length 233 feet 231 feet Beam 21 feet 21.5 feet Draft 12.S feet 12.5 feet The report reads: °In the trials the maxi mum surface speed of the was 13.8 knots, while the S-3 made 14.7 knots. The sub merged speed of U-/// was 7.8 knots, while S-3 made 12.4—a remarkable difference in favor of The radius of action of the two boats is carried 15 to 20 torpedoes and was able to travel 100 miles submerged, remaining com pletely submerged up to 48 hours. On fairly reliable information we learn that England at the outbreak of war had about 80 submarines, built about 130 more and lost about 50 during the conflict. The British experts were sur prised, when the Germans brought in their submarines according to the terms of the armistice, how little they had to learn from them. By 1917 both England and the United States were building submarines of 1,500 to 2,000 tons. And now, it is claimed, Britain has in her a 1,700-ton submarine carrying a 12-inch gun (six-inch guns were the big calibre during the war). She has two tubes and an anti-aircraft gun. It is also said that the British have steam-driven 2,700-ton submarines with surface speed of 23 to 25 knots. In Sep tember 19l6 was published an interesting report of the United States navy making comparative tests of American submarines alongside the German (examples of which arrived here also in favor of S-3, despite all the furore that was created by the advent of the U-boats on the American coast during the war. can
cruise 8,500 miles at eight knots, while S-3 can cover 10,000 miles at 11 knots. The submerged cruising radius shows an equal preponderance in favor of S-3. Both can carry 12 torpedoes. mounts two four-inch guns, one forward, one aft, while S-3 mounts one gun forward, this practice of one gun on a submarine being standard practice in the United States navy.' Living accommodations are far inferior on the German boat, and, according to the report, un necessarily so. As to seaworthiness the Amer ican is the better, °decks drier, her bridge less subject to green seas, and her general behavior in a sea-way superior.° Diving capabilities dif fered little, but slightly in favor of the S-3. The latest word in United States undersea boat construction is the built September 1919 from designs of the Electric Boat Company and declared to be the fastest Diesel-engined boat afloat. She has a cruising radius of about 7,000 miles, is 268 feet long and her surface speed is expected to develop 20 knots an hour, 13 knots submerged.
Bibliography.— Bishop, F.,