S2, a Finnish Sokol class torpedo boat, sinks during a fierce storm near the coast of Pori in the Gulf of Bothnia, taking with it the whole crew of 53.

S2 was a Finnish Sokol-class torpedo boat that had been seized from the Russians after the Finnish Civil War 1918. She sank during a fierce storm on 4 October 1925, taking with her the whole crew of 53.

The Finnish S-class torpedo boats was a series of six ex-Russian torpedo boats that had been taken over by the Finns after the Russian Revolution and the Finnish Civil War.

A torpedo boat is a relatively small and fast naval ship designed to carry torpedoes into battle. The first designs were steam-powered craft dedicated to ramming enemy ships with explosive spar torpedoes. Later evolutions launched variants of self-propelled Whitehead torpedoes.

Pori is a city in Finland and the regional capital of Satakunta. It is located on the west coast of the country, on the Gulf of Bothnia. The population of Pori is approximately 83,000, while the sub-region has a population of approximately 128,000. It is the 10th most populous municipality in Finland, and the eighth most populous urban area in the country.

The Gulf of Bothnia is divided into the Bothnian Bay, the (North) Kvarken and the Bothnian Sea, and it is the northernmost arm of the Baltic Sea, between Finland's west coast and the northern part of Sweden's east coast. In the south of the gulf lies Åland, between the Sea of Åland and the Archipelago Sea.