HMS ''H4'' was a British H-class submarine built by the

Canadian Vickers Canadian Vickers Limited was an aircraft and shipbuilding company that operated in Canada during the early part of the 20th century until 1944. A subsidiary of Vickers Limited, it built its own aircraft designs as well as others under licence. ...

Co.,

Montreal Montreal ( ; officially Montréal, ) is the second-most populous city in Canada and most populous city in the Canadian province of Quebec. Founded in 1642 as '' Ville-Marie'', or "City of Mary", it is named after Mount Royal, the triple ...

. She was laid down on 11 January 1915 and was commissioned on 5 June 1915. After her commissioning, HMS ''H4'' and sister ships , and crossed the Atlantic from St. John's, Newfoundland to

Gibraltar ) , anthem = " God Save the King" , song = " Gibraltar Anthem" , image_map = Gibraltar location in Europe.svg , map_alt = Location of Gibraltar in Europe , map_caption = United Kingdom shown in pale green , mapsize = , image_map2 = Gib ...

being escorted by the armed merchant cruiser . ''H4'' sank the

U-boat U-boats were naval submarines operated by Germany, particularly in the First and Second World Wars. Although at times they were efficient fleet weapons against enemy naval warships, they were most effectively used in an economic warfare ro ...

in the Adriatic on 23 May 1918. She was sold on 30 November 1921 in

Malta Malta ( , , ), officially the Republic of Malta ( mt, Repubblika ta' Malta ), is an island country in the Mediterranean Sea. It consists of an archipelago, between Italy and Libya, and is often considered a part of Southern Europe. It lies ...

Design

Like all pre-''H11'' British H-class submarines, ''H4'' 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 . ''H4'' was fitted with a Hotchkiss

quick-firing gun A quick-firing or rapid-firing gun is an artillery piece, typically a gun or howitzer, which 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 an ...

(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 bows 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 World War I (28 July 1914 11 November 1918), often abbreviated as WWI, was List of wars and anthropogenic disas ...

but was designed to meet Royal Navy specifications. Its

complement A complement is something that completes something else. Complement may refer specifically to: The arts * Complement (music), an interval that, when added to another, spans an octave ** Aggregate complementation, the separation of pitch-clas ...

was twenty-two crew members.

References

* {{DEFAULTSORT:H04 British H-class submarines Ships built in Quebec 1915 ships World War I submarines of the United Kingdom Royal Navy ship names