Chilean submarine Fresia

	British submarine H20 in drydock, East Boston, 1915. The vessel later joined the Chilean Navy as Fresia.
History
Chile
Name	H6
Builder	Fore River Yard, Quincy, Massachusetts
Launched	26 July 1915
Acquired	1917
Renamed	Fresia, 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 ;

Last updated January 21, 2023

The Chilean submarine Fresia was an H-class submarine of the Chilean Navy. The vessel was originally ordered by the United Kingdom's Royal Navy as HMS H20, but was handed over to Chile in 1917 as H6.

Description

Fresia 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 draught 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 Fresia 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]

Career

H20 was a H-class submarine built by Fore River Yard of Quincy, Massachusetts. She was launched on 25 August 1915. Because the United States was neutral (having not yet entered World War I), H20 along with sister ships H11, H12, H13, H14, H15, H16, H17, H18, and H19 were all interned by the United States government. As a result, H20 was never commissioned into the Royal Navy. Instead, she and H13, H16, H17, H18, and H19 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 H6 when turned over to Chile in 1917, she was renamed Fresia in 1924. She served with the Chilean Navy until she was stricken in 1945.

Notes

1 2 Gardiner & Gray, pp. 92, 409

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References

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.

v t e Holland 602 type submarines
Royal Canadian Navy CH class	CH-14 CH-15
Chilean Navy Chilean H class	H1 ⁄ Guacolda H2 ⁄ Tegualda H3 ⁄ Rucumilla H4 ⁄ Guale H5 ⁄ Quidora H6 ⁄ Fresia
Regia Marina Italian H class	H1 H2 H3 H4 H5 H6 H7 H8
Imperial Russian and Soviet Navies American Holland class	AG-11 AG-12 AG-13 / AG-16 AG-14 AG-15 AG-21 AG-22 AG-23 AG-24 AG-25 AG-26
Royal Navy British H class	H1 H2 H3 H4 H5 H6 H7 H8 H9 H10 H11 H12 H13 H14 H15 H16 H17 H18 H19 H20 H21 H22 H23 H24 H25 H26 H27 H28 H29 H30 H31 H32 H33 H34 H41 H42 H43 H44 H47 H48 H49 H50 H51 H52
United States Navy United States H class	H-1 H-2 H-3 H-4 H-5 H-6 H-7 H-8 H-9
Preceded by: G class Followed by: L class
List of submarines of the United States Navy List of submarine classes of the United States Navy