Launched 1906. Displacement 515 tons, speed 30 knots. Armament: Three torpedo tubes, one 21-pounder quick-firer, three 4-pounder quick-firers, and two machine guns. Complement, 80. G 137. Launched 1906. Displacement 565 tons, speed 30 knots. Armament: Three torpedo tubes, one 21-pounder quick-firer, three 4-pounder quick-firers, and two machine guns. Complement, 80. G 136. Launched 1906. Displacement 480 tons, speed 27 knots. Armament: Three torpedo tubes, four 4-pounder quick-firers, and two machine guns. Complement, 68. G 135. Launched 1906. Displacement 480 tons, speed 27 knots. Armament: Three torpedo tubes, one 24-pounder quick-firer, two 4-pounder quick-firers, and two machine guns. Complement, 68. G 132-134. Launched 1906. Displacement 480 tons, speed 27 knots. Armament: Three torpedo tubes, four 4-pounder quick-firers, and two machine guns. Complement, 68. S 125-131. Launched 1904. Displacement 480 tons, speed 27 knots. Armament: Three torpedo tubes, three 4-pounder quick-firers, and two machine guns. Complement, 60. S 120-124. Launched 1904. Displacement 460 tons, speed 27 knots. Armament: Three torpedo tubes, three 4-pounder quick-firers, and two machine guns. Complement, 60. S 114-119. Launched 1903. Displacement 415 tons, speed 26 knots. Armament: Three torpedo tubes, three 4-pounder quick-firers, and two machine guns. Complement, 56. G 108-113. S 102-107. S 90-101. Destroyers of 400 tons, launched in 1901. The maximum speed is 26 knots. Armament: Three small quick-firers, two machine guns, three torpedo tubes. The complement is 56 officers and men. TAKU.--This is a destroyer of 280 tons and 30 knots speed. She carries three small guns, and two torpedo tubes. Complement: 49 officers and men. She was captured from the Chinese during the Boxer campaign. D 10.--A destroyer of 350 tons and 28 knots speed, armed with five small guns, two machine guns, and two torpedo tubes. Complement, 60 officers and men. D 9.--An old destroyer of 375 tons and 24 knots speed. She carries three small guns, two Maxims, and three torpedo tubes. Complement, 49 officers and men. D 3-8.--Very old destroyers, of more than 300 tons displacement and about 22 knots speed. They carry some small guns and three torpedo tubes. Complement, 49 officers and men. [Illustration] _Helgoland._ _Photo: Topical War Service._ =HELGOLAND CLASS.= HELGOLAND, OSTFRIESLAND, THÜRINGEN, OLDENBURG. Displacement: 21,000 tons. Speed: 21 knots; Guns: 12 12·2in., 14 6in., 14 24pdrs.; Torpedo tubes: 6. [Illustration] Astern fire: Broadside: Ahead fire: 6 12·2in. 8 12·2in. 6 12·2in. 4 6in. 7 6in. 4 6in. D 1 (CARMEN). D 2 (ALICE ROOSEVELT). Very old destroyers, displacing 225 tons, with a speed of 21 knots. Armament: five small guns and three torpedo-tubes. Complement, 46. SUBMARINES.