The Jymy class motor torpedo boats or J class was an Italian

Italy

Italy , officially the Italian Republic languages]] under the European Charter for Regional or Minority Languages. In each of these, Italy's official name is as follows:;;;;;;;;), is a unitary parliamentary republic in South-Central Europe. To the north it borders France, Switzerland, Austria and...

-designed class of motor torpedo boat

Motor Torpedo Boat

Motor Torpedo Boat was the name given to fast torpedo boats by the Royal Navy, and the Royal Canadian Navy.The capitalised term is generally used for the Royal Navy boats and abbreviated to "MTB"...

s, seeing service during World War II

World War II

World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...

 with the Italian Navy

Italian Navy

Italian Navy may refer to:* Pre-unitarian navies of the Italian states* Regia Marina, the Royal Navy of the Kingdom of Italy * Italian Navy , the navy of the Italian Republic...

 in the Lake Ladoga

Lake Ladoga

Lake Ladoga is a freshwater lake located in the Republic of Karelia and Leningrad Oblast in northwestern Russia, not far from Saint Petersburg. It is the largest lake in Europe, and the 14th largest lake by area in the world.-Geography:...

, and later with the Finnish Navy

Finnish Navy

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" simply short for "Finnish Navy Ship"...

 in the Gulf of Finland

Gulf of Finland

The Gulf of Finland is the easternmost arm of the Baltic Sea. It extends between Finland and Estonia all the way to Saint Petersburg in Russia, where the river Neva drains into it. Other major cities around the gulf include Helsinki and Tallinn...

.

The four boats of the J class were built by Cantieri Baglietto in Genoa

Genoa

Genoa |Ligurian]] Zena ; Latin and, archaically, English Genua) is a city and an important seaport in northern Italy, the capital of the Province of Genoa and of the region of Liguria....

, Italy and transported to Finland over land and sea. The ships were initially used by an Italian contingent, the XII Squadriglia MAS, who served in Lake Ladoga

Naval Detachment K

The Finnish Naval Detachment K was a flotilla that operated on Lake Ladoga during World War II.-Background:The Continuation War began in the summer of 1941. The Finns, who had operated naval units on Lake Ladoga before World War II, began reestablishing a flotilla on the lake as soon as their...

 during the sailing season of 1942. The Finns bought the boats on 5 May 1943 in Tallinn

Tallinn

Tallinn is the capital and largest city of Estonia. It occupies an area of with a population of 414,940. It is situated on the northern coast of the country, on the banks of the Gulf of Finland, south of Helsinki, east of Stockholm and west of Saint Petersburg. Tallinn's Old Town is in the list...

 and transported them to Finland.

The ships were converted into patrol boats in 1949, in accordance with the Paris peace treaty

Paris Peace Treaties, 1947

The Paris Peace Conference resulted in the Paris Peace Treaties signed on February 10, 1947. The victorious wartime Allied powers negotiated the details of treaties with Italy, Romania, Hungary, Bulgaria, and Finland .The...

. The J class vessels were scrapped in 1961.

Vessels of the class

• Jylhä (J 1, ex-MAS 526)
• Jyry (J 2, ex-MAS 527)
• Jyske (J 3, ex-MAS 528)
• Jymy (J 4, ex-MAS 529)