One of the Finnish Navy's traditions has been to name its major combat ships after regions in Finland. The name "Pohjanmaa", which is the Finnish name for the region Ostrobothnia, has been used both by the Finnish and Swedish navies for previous ships and classes of ships, dating back to the 18th century with the first recorded vessel being "Gamla Pojama" "("Old Pohjanmaa")", that was launched in 1760, and the last one, being the minelayer/training vessel , which was sold in 2016. The aforementioned 18th century Pohjanmaa, alongside the Hämeenmaa, Uusimaa and Turunmaa types were also the four main "archipelago frigate" types used in the 1790 Battle of Svensksund, which is one of the largest Finnish (Finland was a part of Sweden at the time) naval victories and the largest naval battle in the Baltic Sea to date.