SM U-37
Introduction '''SM ''U-37''''' was one of the 329 submarines serving in the Imperial German Navy in World War I. U-37 was engaged in naval warfare and took part in the First Battle of the Atlantic.
Design German Type U 31 submarines were double-hulled ocean-going submarines similar to Type 23 and Type 27 subs in dimensions and differed only slightly in propulsion and speed. They were considered very good high sea boats with average manoeuvrability and good surface steering. ''U-37'' had an overall length of , her pressure hull was  long. The boat's beam was  (o/a), while the pressure hull measured . Type 31s had a draught of  with a total height of . The boats displaced a total of ;  when surfaced and  when submerged. ''U-37'' was fitted with two Germania 6-cylinder two-stroke diesel engines with a total of  for use on the surface and two Siemens-Schuckert double-acting electric motors with a total of  for underwater use. These engines powered two shafts each with a  propeller, which gave the boat a top surface speed of , and  when submerged. Cruising range was  at  on the surface, and  at  under water. Diving depth was .The U-boat was armed with four  torpedo tubes, two fitted in the bow and two in the stern, and carried 6 torpedoes. Additionally ''U-37'' was equipped in 1915 with two  Uk L/30 deck guns.The boat's complement was 4 officers and 31 enlisted.
Summary of raiding history DateNameNationalityTonnageFate25 March 1915''Delmira''3,459Damaged31 March 1915''Emma''1,617Sunk1 April 1915''Seven Seas''1,194Sunk
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