A Soviet-built submarine display which served in the Indonesian Navy since 1962. Launched in 1952, and since her decommissioning in 1990 has been preserved as a monument. The body/hull was slightly cut for stairs & door for easier public entrance & viewing. Beside the monument there is a building where a short film about the history of the submarine can be viewed. It is located beside the river next to Delta Plaza. You also can see the Suroboyo monument near the river.