SS Kuru was a steam ship which sank on 7 September 1929 in the lake Näsijärvi, in Tampere, Finland. The sinking is still the most severe maritime disaster in Finnish lakes or rivers. It led to the loss of 136 lives, according to the passenger counts and the officers; most sources frequently list the death toll as 138. There were 150 passengers and 12 crew members. One of the drowned was the Member of the Parliament Ida Vihuri. During the First World War, the ship served as a part of the Imperial Russian Navy's Satakunta Flotilla.