The Taisto-class motor torpedo boats or T class was a series of motor torpedo boats, which saw service with the Finnish Navy during World War II. Following the war, the Paris Peace Treaty of 1947 prohibited the Finnish Navy from employing torpedo-carrying vessels of any kind and the Taisto class were converted into motor gunboats. By 1964, all vessels of the class had been removed from service.
Following the invasion of the Soviet Union by Germany in World War II, the war between Finland and the Soviet Union began again. The Finnish Navy, tasked with closing the Gulf of Finland, sought more vessels. Based on an Italian design and built under license, eight Taisto vessels were manufactured at Turun Veneveistämö. All eight vessels were launched between 1943 and 1946. The vessels had a displacement of 22t, and were 17.8m (58.4feet) long with a beam of and a draught of . They were powered by two Isotta Fraschini petrol engines creating 2300bhp and had a maximum speed of 48kn. They mounted two 450mm torpedo tubes and one Madsen gun.
| Taisto class construction data | ||||
|---|---|---|---|---|
| Number | Ship | Builder | Fate | |
| T 1 | Tarmo | Turun Veneveistämö | ||
| T 2 | Taisto / Taisto 2 | Scrapped 1963 | ||
| T 3 | Tyrsky / Taisto 3 | Removed from service in 1966. Preserved at the Turku Maritime Museum Forum Marinum. | ||
| T 4 | Tuima / Taisto 4 | Scrapped 1963 | ||
| T 5 | Tuisku / Taisto 5 | Scrapped 1963 | ||
| T 6 | Tuuli / Taisto 6 | Removed from service in 1966 | ||
| T 7 | Taisto 7 | Removed from service in 1966. Preserved in a running state as MS Seiska in Lappeenranta, Finland. | ||
| T 8 | Taisto 8 | Removed from service in 1966. | ||
The Paris Peace Treaty of 1947 was signed following the end of World War II, and Finland was prohibited by the treaty from having torpedo-carrying vessels. The Taisto class were converted to motor gunboats with their torpedo armament and 20 mm gun being removed and the vessels receiving one gun and two guns. There is some debate amongst the sources over the fate of the ships. Westerlund & Chumbley state that by 1964 all eight vessels had been stricken from the Finnish Navy. However, Blackman states that only three had been discarded by 1964 and that four others were only removed from service in 1966.