Continuing our theme of strange Soviet subs, we feature the Project 633RV / a modified variant of the NATO-designated Romeo class Diesel-Electric attack submarines. S-49/PZS-50 (Commissioned in 1961) is still in existence, up a bay in Sevastopol.
The major modifications of 1970-1972 to two Romeo boats were the addition of (conspicuous) 650mm tubes above the bows for a test Anti-Submarine Warfare missile system the RPK-7 “Veter”, while 2 of the 533mm torpedo tubes were also modified for RPK-6 “Vodopad” ASW missiles. Both these are NATO-designated SS-N-16 “Stallion.” These could be armed with an Anti-Submarine Warfare torpedo or a nuclear depth charge. The Veter had a range of roughly 100km. S-49 was reportedly decommissioned late 2019, and may become a museum boat.