HMS ''H3'' was a British H-class

submarine A submarine (often shortened to sub) is a watercraft capable of independent operation underwater. (It differs from a submersible, which has more limited underwater capability.) The term "submarine" is also sometimes used historically or infor ...

built by

Canadian Vickers Canadian Vickers Limited was an aircraft and shipbuilding company that operated in Canada from 1911 until 1944. A subsidiary of Vickers Limited, it built its own aircraft designs as well as others under licence. Canadair absorbed the Canadian Vi ...

Co,

Montreal Montreal is the List of towns in Quebec, largest city in the Provinces and territories of Canada, province of Quebec, the List of the largest municipalities in Canada by population, second-largest in Canada, and the List of North American cit ...

. She was laid down on 11 January 1915 and was commissioned on 3 June 1915. After commissioning she crossed the Atlantic from St. John's,

Newfoundland Newfoundland and Labrador is the easternmost province of Canada, in the country's Atlantic region. The province comprises the island of Newfoundland and the continental region of Labrador, having a total size of . As of 2025 the population ...

Gibraltar Gibraltar ( , ) is a British Overseas Territories, British Overseas Territory and British overseas cities, city located at the southern tip of the Iberian Peninsula, on the Bay of Gibraltar, near the exit of the Mediterranean Sea into the A ...

escorted by the

armed merchant cruiser An armed merchantman is a merchant ship equipped with guns, usually for defensive purposes, either by design or after the fact. In the days of sail, piracy and privateers, many merchantmen would be routinely armed, especially those engaging in lo ...

. She was accompanied by , and . ''H3'' was mined in the

Gulf of Cattaro The Bay of Kotor ( sh-Latn-Cyrl, Boka kotorska, Бока которска, separator=" / ", ), also known as the Boka ( sh-Cyrl, Бока), is a winding bay of the Adriatic Sea in southwestern Montenegro and the region of Montenegro concentrated a ...

Adriatic The Adriatic Sea () is a body of water separating the Italian Peninsula from the Balkans, Balkan Peninsula. The Adriatic is the northernmost arm of the Mediterranean Sea, extending from the Strait of Otranto (where it connects to the Ionian Se ...

on 15 July 1916.

Design

Like all pre-''H11''

British H-class submarine The British H-class submarines were Holland 602 type submarines used by the Royal Navy. The submarines constructed for the British Royal Navy between 1915 and 1919 were designed and built in response to German boats which mined British wate ...

s, ''H3'' had a displacement of at the surface and while submerged. It had a total length of , a beam of , and a draught of . It contained a diesel engines providing a total power of and two electric motors each providing power. Retrieved fro
Naval-History
on 20 August 2015. The use of its electric motors made the submarine travel at . It would normally carry of fuel and had a maximum capacity of . The submarine had a maximum surface speed of and a submerged speed of . British H-class submarines had ranges of . ''H3'' was fitted with a Hotchkiss

quick-firing gun A quick-firing or rapid-firing gun is an artillery piece, typically a gun or howitzer, that has several characteristics which taken together mean the weapon can fire at a fast rate. Quick-firing was introduced worldwide in the 1880s and 1890s and ...

(6-pounder) and four

torpedo tube A torpedo tube is a cylindrical device for launching torpedoes. There are two main types of torpedo tube: underwater tubes fitted to submarines and some surface ships, and deck-mounted units (also referred to as torpedo launchers) installed aboa ...

s. Its torpedo tubes were fitted to the

bow BOW as an acronym may refer to: * Bag of waters, amniotic sac * Bartow Municipal Airport (IATA:BOW), a public use airport near Bartow, Florida, United States * Basic operating weight of an aircraft * BOW counties, made of Brown, Outagamie, and Winn ...

and the submarine was loaded with eight torpedoes. It is a

Holland 602 type submarine The Holland 602 type submarine, also known as the H-class submarine, was one of the most numerous submarines of World War I. The type was designed by the Electric Boat Co. of the United States, but most of the boats were built abroad: in Canada by ...

but was designed to meet Royal Navy specifications. Its

complement Complement may refer to: The arts * Complement (music), an interval that, when added to another, spans an octave ** Aggregate complementation, the separation of pitch-class collections into complementary sets * Complementary color, in the visu ...

was twenty-two crew members.

Citations

References

External links

'Submarine losses 1904 to present day' - Royal Navy Submarine Museum
{{DEFAULTSORT:H03 British H-class submarines Ships built in Montreal 1915 ships World War I submarines of the United Kingdom Royal Navy ship names Maritime incidents in 1916 World War I shipwrecks in the Adriatic Sea Ships sunk by mines Lost submarines of the United Kingdom