A comparatively old group of destroyers of 30 knots speed. Armed with one 12-pounder, five smaller guns, and two torpedo tubes. The complement is about 60 officers and men. “B” CLASS. (Completed 1895-1900.) ALBACORE. ARAB. BONETTA. EARNEST. EXPRESS. GRIFFON. KANGAROO. LIVELY. LOCUST. MYRMIDON. ORWELL. PANTHER. PETEREL. QUAIL. SEAL. SPITEFUL. SPRIGHTLY. SUCCESS. SYREN. THRASHER. WOLF. An early class of destroyer, with a speed of 30 knots. Armament: one 12 pounder, five 6 pounder guns, two torpedo tubes. Complement: about 60 officers and men. “A” CLASS. (1894-5.) CONFLICT. FERVENT. LIGHTNING. OPOSSUM. PORCUPINE. RANGER. SUNFISH. SURLY. ZEPHYR. These are our oldest destroyers, having been launched nearly twenty years ago. The speed is 27 knots. Armament: one 12-pounder, five smaller guns, two torpedo tubes. Complement, 50 officers and men. [Illustration] _H.M.S. Indomitable._ _Photo: Symonds & Co._ =INDOMITABLE CLASS.= INDOMITABLE, INFLEXIBLE, INVINCIBLE. Displacement: 17,250 tons. Speed: 28 knots; Guns: 8 12in., 16 4in.; Torpedo tubes: 3. [Illustration] Astern fire: Broadside: Ahead fire: 6 12in. 8 12in. 6 12in. FLOTILLA LEADERS. (Completed 1914.) KEMPENFELT. NIMROD. These two large destroyers were ordered by the Chilian Government from Messrs. White & Co., and purchased by the British Admiralty on the outbreak of war. The displacement is 1,850 tons, speed more than 31 knots, and the armament consists of six 4-in. quick-firers, two Maxims, and three torpedo tubes. The complement is about 110 officers and men. SUBMARINES. “A” CLASS.--These submarines are the oldest in commission. The displacement is 204 tons, and on the surface they can travel at 12 knots, below water at 9 knots. They are armed with two torpedo tubes. Complement: 11 officers and men. “B” CLASS.--These boats displace 314 tons, and have a surface and submerged speed of 13 and 9 knots respectively. They are armed with two torpedo tubes. Sixteen officers and men are carried. “C” CLASS.--This class has a displacement of about 320 tons. Above water their speed is 14 knots, below it is 10 knots. They are fitted with two torpedo tubes, and have a crew of 16 officers and men. “D” CLASS.--These are fairly new boats of about 550 tons displacement. On the surface the speed is 16 knots, below water it is 10 knots. They are armed with three torpedo tubes, and are also believed to have a quick-firing gun. The complement is about 20 officers and men. “E” CLASS. The “E” class comprises our latest boats, and no official details of the class have been published. The displacement, however, is about 800 tons, and the surface speed 16 knots. There are four torpedo tubes and two quick-firing guns, the latter being on disappearing mountings. About 25 officers and men are carried. A.E. 1 and A.E. 2. (Australian boats.) These boats are identical with the “E” class. NAUTILUS. “F” CLASS. SWORDFISH.