Finnish Navy

maritime warfare branch of Finland's military

thumb|Gulf of Finland at Upinniemi Upinniemi () is a village in the municipality of Kirkkonummi in southern Finland. It is located approximately 12 km south of the municipal centre.

Isosaari () is an island in Helsinki, part of the Ulkosaaret district of the city, more specifically of Itäsaaret, i.e. ‘eastern islands’. It was one of the fortified islands of the Gulf of Finland. Isosaari is one of the outermost islands in the Helsinki region, and it is a site that is important from the perspective of cultural history. Its sights and its nature are unique.

1941 war warfare operation in the Baltic Sea