The Som class () were a series of submarines built for the Imperial Russian Navy in 1904âÂÂ1907. They were designed by the Electric Boat Company and ordered in the 1904 emergency programme at the time of the Russo-Japanese War. The boats were built in St. Petersburg and were designed to be transportable by train. The first boat, , was originally Fulton, an experimental submarine that was the prototype for and subsequent s. The vessel was sold and delivered to Russia in sections and re-assembled in St. Petersburg.
In July 2015 it was reported that the wreck of Som (áþü) had been located in Swedish waters.