The Finnish Navy is one of the branches of the Finnish Defence Forces. The navy employs 2,300 people and about 4,300 conscripts are trained each year. Finnish Navy vessels are given the ship prefix "FNS", short for "Finnish Navy ship", but this is not used in Finnish-language contexts. The Finnish Navy also includes coastal forces and coastal artillery.
The Baltic Sea campaigns were conducted by Axis and Allied naval forces in the Baltic Sea, the Gulf of Bothnia, the Gulf of Finland and the connected lakes Ladoga and Onega on the Eastern Front of World War II. After early fighting between Polish and German forces, the main combatants were the Kriegsmarine and the Soviet Navy, with Finland supporting the Germans until 1944 and the Soviets thereafter. The Swedish Navy and merchant fleet played important roles, and the British Royal Navy planned Operation Catherine for control of the Baltic Sea and its exit choke point into the North Sea.
Iku-Turso is a malevolent sea monster in Finnish mythology, best known for appearing in the Kalevala. Nowadays Meritursas means octopus in Finnish, named after Iku-Turso, but originally tursas is an old name for walrus while the more common term is mursu. However, it is more common to see the word mustekala, the name of its Subclass Coleoidea in Finnish, for the octopus.
Iku-Turso was a 500-tonne Vetehinen-class submarine that served in the Finnish Navy during the Second World War. It was launched in May 1931 and was named after a mythological Finnish sea monster, Iku-Turso. It was built by the Crichton-Vulcan shipyard in Turku according to a project developed by NV Ingenieurskantoor voor Scheepsbouw, "IvS", and was scrapped in 1953.
The Shchuka-class submarines, also referred to as Sh or Shch-class submarines, were a medium-sized class of Soviet submarines, built in large numbers and used during World War II. "Shchuka" is Russian for pike. Of this class, only two submarines entered service after 1945, although they were launched before the war.
The Vetehinen-class submarine was a Finnish 500-tonne submarine class of three vessels that was designed and built in the 1920s and early 1930s. The Vetehinen class served in the Finnish Navy during World War II. The class was designed by the Dutch front company Ingenieurskantoor voor Scheepsbouw den Haag (I.v.S) and built by the Finnish Crichton-Vulcan shipyard in Turku. The class was based on the German World War I Type UB III and Type UC III submarines and served as prototype for Type VII submarines.
VMV-class patrol boat was a series of Finnish patrol boats, which served with the Finnish Coast Guard and the Finnish Navy during World War II.
The Black Sea Campaigns were the operations of the Axis and Soviet naval forces in the Black Sea and its coastal regions during World War II between 1941 and 1944, including in support of the land forces.
Riilahti was a Ruotsinsalmi class minelayer of the Finnish Navy. Riilahti was commissioned in 1940 and sunk in 1943. The vessel was named after the battle of Riilahti, which was fought between Sweden and Russia in 1714.
Submarine warfare in the Black Sea in World War II during 1941 primarily involved engagements between submarines of the Soviet Black Sea Fleet attacking Axis merchantmen defended by Romanian and Bulgarian warships. These engagements were a part of the naval Black Sea campaigns between Axis and Soviet naval forces.
The Gulf of Finland U-boat campaign lasted in the Gulf of Finland during the World War II against the Soviet Union between summer 1944 and spring 1945. During the campaign Finland switched sides and joined the Allies.
The Soviet submarine Baltic Sea campaign in 1943 was launched by the Soviet Navy to harass the strategic iron ore traffic from neutral Sweden to Nazi Germany on the Eastern Front during the WWII. Other operations were launched by Allies, especially by the Royal Navy. The offensive was a repetition of the previous campaign in 1942 but resulted in a failed outcome.
Submarine warfare in the Black Sea in World War II during 1942 involved engagements between primarily submarines of the Soviet Black Sea Fleet attacking Axis merchantmen defended by Romanian and German naval warships. These engagements were a part of the Black Sea campaigns between Axis and Soviet naval forces.
Submarine warfare in the Black Sea in World War II during 1943 involved engagements between submarines of the Soviet Black Sea Fleet attacking Axis merchantmen defended by Romanian and German naval warships, as well as and German U-boats attacking Soviet merchants on the eastern Black Sea. These engagements were a part of the Black Sea campaigns between Axis and Soviet naval forces.
Submarine warfare in the Black Sea in World War II during 1944 involved engagements between submarines of the Soviet Black Sea Fleet attacking Axis merchantmen, defended by Romanian and German naval warships, as well as German U-boats and Romanian submarines attacking Soviet merchants on the eastern Black Sea. Before the conclusion of the campaign, Romania joined the Allies after King Michael's Coup. These engagements were a part of the naval Black Sea campaigns.
The Soviet submarine Baltic Sea campaign in 1941 was launched by the Soviet Navy at the early stage of Operation Barbarossa. The offensive was hampered by the quick German ground advance and the retreat of Soviet naval vessels from the main Baltic harbors.
The Soviet submarine Baltic Sea campaign in 1944 was launched by the Soviet Navy to harass enemy shipping and naval military assets of the Nazi Germany on the Eastern Front during World War II.
The Soviet naval Baltic Sea campaign in 1945 was launched by the Soviet Navy to harass enemy shipping and naval military assets of Nazi Germany on the Eastern Front during World War II. Both submarines and surface units of the Soviet Navy were employed. The campaign scored successes during Operation Hannibal.
The Gulf of Riga campaign was fought by the Soviet Navy against the Kriegsmarine during Operation Barbarossa in 1941.
The Barents Sea campaign in 1941 was a submarine operation in the Arctic waters of the Barents Sea during World War II. It was a combined Soviet and British campaign, with boats departing from Polyarny to harass German shipping along the Norwegian coast.
Germany 
Finland 
Sweden (neutral)
Soviet Union