::H21-class submarine::

H21-class submarine

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History Learning Site > World War One > British submarines in World War One > H21-class submarine

H21-class submarines statistics:

Number completed before 1919	10
Number completed after 1919	14
Lost in action	2 (1939-45)
Lost accidentally	3
Prototype date	1918
Surface tonnage	440
Submerged tonnage	500
Length	171 feet
Engine	Diesel
Horsepower	480
Screws	2
Surface speed	13 knots
Submerged speed	10 knots
Torpedo tubes	21 inches
Number of torpedoes tubes	4
Guns	1
Crew	22

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