History
Chile
Name	H2
Builder	Fore River Yard, Quincy, Massachusetts
Launched	26 July 1915
Acquired	1917
Renamed	Tegualda, 1924
Stricken	1945
General characteristics
Class and type	H-class submarine
Displacement	364 long tons (370 t) surfaced 434 long tons (441 t) submerged
Length	150 ft 9 in (45.9 m)
Beam	15 ft 9 in (4.8 m)
Draught	12 ft 4 in (3.8 m)
Propulsion	1 × 480 bhp (358 kW) diesel engine 2 × 640 hp (477 kW) electric motors
Speed	13 knots (24 km/h; 15 mph) surfaced 10 knots (19 km/h; 12 mph) submerged
Range	2,800 nmi (5,200 km; 3,200 mi) at 11 kn (20 km/h; 13 mph) surfaced 30 nmi (56 km; 35 mi) at 5 kn (9.3 km/h; 5.8 mph) submerged
Complement	22
Armament	4 × 18 in (457 mm) bow torpedo tubes 8 × 18-inch torpedoes

The Chilean submarine Tegualda was an H-class submarine of the Chilean Navy. The vessel was originally ordered by the United Kingdom's Royal Navy as HMS H16, but was handed over to Chile in 1917 as H2.

Tegualda was a single-hulled submarine, with a pressure hull divided into five watertight compartments. The submarine had a length of 150 feet 9 inches (45.9 m) overall, a beam of 15 feet 9 inches (4.8 m) and a draft of 12 feet 4 inches (3.8 m). She displaced 363 long tons (369 t) on the surface and 434 long tons (441 t) submerged. The H-class submarines had a crew of 22 officers and enlisted men.^[1]

The submarine had two propellers, each of which was driven by a 240-horsepower (180 kW) diesel engine as well as a 320-horsepower (239 kW) electric motors. This arrangement gave Tegualda a maximum speed of 13 knots (24 km/h; 15 mph) while surfaced and 10.5 knots (19.4 km/h; 12.1 mph) submerged. She had a range of 1,750 nmi (3,240 km; 2,010 mi) at 7 knots (13 km/h; 8.1 mph) while on the surface and 30 nmi (56 km; 35 mi) at 5 kn (9.3 km/h; 5.8 mph) while submerged. The boat had a capacity of 17.5 long tons (17.8 t) of fuel oil. The H-class submarines were equipped with four 18-inch (457 mm) torpedo tubes in the bow and carried eight torpedoes.^[1]

H16 was a H-class submarine built by Fore River Yard of Quincy, Massachusetts. She was launched on 26 July 1915. Because the United States was neutral (having not yet entered World War I), H16 along with sister ships H11, H12, H13, H14, H15, H17, H18, H19, and H20 were all interned by the United States government. As a result, H16 was never commissioned into the Royal Navy. Instead, she and H13, H17, H18, H19, and H20 were transferred to the Chilean Navy as partial recompensation for the appropriation of two 28,000-ton dreadnoughts (Almirante Latorre and Almirante Cochrane). Originally named H2 when turned over to Chile in 1917, she was renamed Tegualda in 1924. She served with the Chilean Navy until she was stricken in 1945.

• Chesneau, Roger, ed. (1980). Conway's All the World's Fighting Ships 1922–1946. Greenwich, UK: Conway Maritime Press. ISBN 0-85177-146-7.
• Gardiner, Robert & Gray, Randal, eds. (1985). Conway's All the World's Fighting Ships 1906–1921. Annapolis, Maryland: Naval Institute Press. ISBN 0-85177-245-5.