Jymy-class motor torpedo boat

The Jymy-class motor torpedo boats (English: Rumble) or J class was an Italian-designed class of motor torpedo boats, seeing service during World War II with the Italian Navy in Lake Ladoga, and later with the Finnish Navy in the Gulf of Finland.

Class overview
Name: Jymy class
Builders: Cantieri Baglietto, Genoa, Italy
Operators:
Completed: 4
Retired: 4
General characteristics
Type: Motor torpedo boat
Displacement: 22 tons
Length: 18.7 m (61 ft)
Beam: 4.7 m (15 ft)
Draught: 1.5 m (4 ft 11 in)
Speed: 42 knots (78 km/h; 48 mph)
Range:
  • 330 nmi (610 km; 380 mi) at 42 kn (78 km/h; 48 mph)
  • 836 nmi (1,548 km; 962 mi) at 8 kn (15 km/h; 9.2 mph)
Complement: 1+10
Armament:
  • 1 × 20 mm Breda
  • 1 × 12.7 mm machine gun
  • 2 × 450 mm torpedoes

The four boats of the J class were built by Cantieri Baglietto in Genoa, 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 during the sailing season of 1942. The Finns purchased the boats on 5 May 1943 in Tallinn and transported them to Finland.

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