# HMS H47

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Submarine of the Royal Navy

HMS H47 History United Kingdom Name HMS H47 Builder William Beardmore and Company, Dalmuir Laid down 20 November 1917 Launched 19 November 1918 Commissioned 25 February 1919 Fate Sunk after collision, 9 July 1929 General characteristics Class & type H-class submarine Displacement 423 long tons (430 t) surfaced 510 long tons (518 t) submerged Length 171 ft 0 in (52.12 m) Beam 15 ft 4 in (4.67 m) Propulsion 1 × 480 hp (358 kW) diesel engine 2 × 620 hp (462 kW) electric motors Speed 11.5 knots (21.3 km/h; 13.2 mph) surfaced 9 knots (17 km/h; 10 mph) submerged Range 2,985 nmi (5,528 km) at 7.5 kn (13.9 km/h; 8.6 mph) surfaced 130 nmi (240 km) at 2 kn (3.7 km/h; 2.3 mph) submerged Complement 22 Armament 4 × 21 in (533 mm) bow torpedo tubes 8 × 21-inch torpedoes

**HMS *H47*** was a British [H-class](/source/British_H-class_submarine) [submarine](/source/Submarine) built by [William Beardmore and Company](/source/William_Beardmore_and_Company), [Dalmuir](/source/Dalmuir). She was laid down on 20 November 1917 and was commissioned on 25 February 1919. The submarine had a complement of twenty-two crew members. HMS *H47* was sunk in a collision with the [British L-class submarine](/source/British_L-class_submarine) [*L12*](/source/HMS_L12) off [Milford Haven](/source/Milford_Haven), [Wales](/source/Wales), on 9 July 1929. Twenty one of the crew were lost with only three survivors.

## Design

Like all post-*H20* [British H-class submarines](/source/British_H-class_submarine), *H47* had a displacement of 423 long tons (430 t) at the surface and 510 long tons (520 t) while submerged.[1] It had a total length of 171 feet (52 m),[2] a beam of 15 feet 4 inches (4.67 m), and a draught of 12 metres (39 ft).[3] It contained a diesel engines providing a total power of 480 horsepower (360 kW) and two electric motors each providing 320 horsepower (240 kW) power.[3] The use of its electric motors made the submarine travel at 11 knots (20 km/h; 13 mph). It would normally carry 16.4 long tons (16.7 t) of fuel and had a maximum capacity of 18 long tons (18 t).[4]

The submarine had a maximum surface speed of 13 knots (24 km/h; 15 mph) and a submerged speed of 10.5 knots (19.4 km/h; 12.1 mph). Post-*H20* British H-class submarines had ranges of 2,985 nautical miles (5,528 km; 3,435 mi) at speeds of 7.5 knots (13.9 km/h; 8.6 mph) when surfaced.[1][3] *H47* was fitted with an [anti-aircraft gun](/source/Anti-aircraft_warfare) and four 21-inch (533 mm) [torpedo tubes](/source/Torpedo_tube). Its torpedo tubes were fitted to the [bow](/source/Bow_(watercraft)) and the submarine was loaded with eight 21 in (533 mm) torpedoes.[1] It is a [Holland 602 type submarine](/source/Holland_602_type_submarine) but was designed to meet Royal Navy specifications. Its [complement](/source/Ship's_company) was twenty-two crew members.[1]

## References

1. ^ [***a***](#cite_ref-batcru_1-0) [***b***](#cite_ref-batcru_1-1) [***c***](#cite_ref-batcru_1-2) [***d***](#cite_ref-batcru_1-3) Gardiner, Robert; Gray, Robert (1985). *Conway's All the World's Fighting Ships 1906-1921*. London: Conway Maritime Press. p. 92. [ISBN](/source/ISBN_(identifier)) [0-85177-245-5](https://en.wikipedia.org/wiki/Special:BookSources/0-85177-245-5).

1. **[^](#cite_ref-Walters2004_2-0)** Derek Walters (2004). [*The History of the British 'U' Class Submarine*](https://books.google.com/books?id=VyeJ9DOXcOAC&pg=PA2). Casemate Publishers. pp. 2–. [ISBN](/source/ISBN_(identifier)) [978-1-84415-131-8](https://en.wikipedia.org/wiki/Special:BookSources/978-1-84415-131-8).

1. ^ [***a***](#cite_ref-Colledge_3-0) [***b***](#cite_ref-Colledge_3-1) [***c***](#cite_ref-Colledge_3-2) [Colledge, J. J.](/source/J._J._Colledge); Warlow, Ben (2006) [1969]. [*Ships of the Royal Navy: The Complete Record of All Fighting Ships of the Royal Navy from the 15th Century to the Present*](/source/Ships_of_the_Royal_Navy) (3rd Rev ed.). London: Chatham Publishing. [ISBN](/source/ISBN_(identifier)) [978-1-86176-281-8](https://en.wikipedia.org/wiki/Special:BookSources/978-1-86176-281-8). [OCLC](/source/OCLC_(identifier)) [67375475](https://search.worldcat.org/oclc/67375475). Retrieved from [Naval-History](http://www.naval-history.net/WW1NavyBritishShips-Dittmar3WarshipsA.htm#10) on 20 August 2015.

1. **[^](#cite_ref-4)** J. D. Perkins (1999). ["Building History and Technical Details for Canadian CC-Boats and the Original H-CLASS"](http://www.gwpda.org/naval/hpatsubs.htm). Electric Boat Company Holland Patent Submarines. Retrieved 20 August 2015.

## Bibliography

- Hutchinson, Robert (2001). *Jane's submarines : war beneath the waves from 1776 to the present day*. London: HarperCollins. [ISBN](/source/ISBN_(identifier)) [978-0007105588](https://en.wikipedia.org/wiki/Special:BookSources/978-0007105588).

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 Navy 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 Soviet Navy American Holland class A-1 A-2 A-3 A-4 A-5 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: K class List of submarines of the United States Navy List of submarine classes of the United States Navy

v t e Shipwrecks and maritime incidents in 1929 Shipwrecks 2 Jan: Malakoff 16 Jan: Hsin Wah 12 Feb: Alloway 19 Feb: Kanowna 22 Mar: I'm Alone 25 Mar: Muggia 29 Mar: Selje 26 May: Aleutian 9 Jul: HMS H47 17 Jul: USS General Alava 1 Aug: Asakaze 30 Aug: San Juan 7 Sep: Kuru 9 Sep: Andaste 11 Sep: Acielle 2 Oct: Commandant Bultinck 22 Oct: Milwaukee 29 Oct: Wisconsin 31 Oct: Senator 4 Nov: Gilbert San 29 Nov: Norwich City 7 Dec: Ägir 18 Dec: Fort Victoria Unknown date: San Antonio Other incidents 5 Jan: Siboney 20 Jan: President Garfield 29 Jan: City of Cairo 28 Feb: Liberty Glo 7 Mar: Thétis 10 Mar: Pengreep 22 Mar: USCGC Dexter 25 Mar: Germaine L D 26 Mar: Europa 28 Mar: Libia 30 Mar: Naïade 6 Apr USS Childs 7 Apr Paris 18 Apr Paris 27 Apr: Duchess of Richmond April (unknown date) Franconia 15 May: Irwell May (unknown date): Duke of Lancaster, Duke of Rothesay 9 Jul: HMS L12 11 Jul: I-55, Kinugasa 3 Aug: Medway Queen 9 Aug: Viceroy of India 20 Aug Paris September (unknown date): Binnendijk, Eider 5 Oct: NRP Adamastor 12 Oct: USFS Widgeon 13 Oct: Empress of Canada 19 Oct: Bowes Castle 20 Oct: USAT Liberty 6 Nov: Barbana G 13 Nov: Ro-63 22 Nov: Parizhskaya Kommuna 7 Dec: Aba 18 Dec: Algonquin 24 Dec: Roosevelt 1928 1930

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