Ronis-class submarine

	Scheme of Ronis-class submarine
Class overview
Name	Ronis class
Operators	Latvian Naval Forces ; Soviet Navy;
Built	1925–1926
In service	1926–1941
Completed	2
Lost	2
General characteristics
Type	Diesel/electric-powered coastal submarine
Displacement	390 long tons (400 t) surfaced; 514 long tons (522 t) submerged;
Length	55.0 m (180 ft 5 in)
Beam	4.8 m (15 ft 9 in)
Draught	3.6 m (11 ft 10 in)
Propulsion	2 shafts,; 2 Sulzer diesels, 1,300 bhp (970 kW); 2 electric motors 700 shp (520 kW);
Speed	14 knots (26 km/h) surfaced; 9 knots (17 km/h) submerged;
Test depth	160 ft (49 m)
Complement	27
Armament	6 × 21 in (533 mm) torpedo tubes (2 bow, and 2 × twin external turnable); 1 × 75 mm (3 in) main deck gun; 2 × 7.62 mm machine guns;

The Ronis-class submarines were built for the Latvian Navy in France in 1925. They were acquired by the Soviets in 1940 following the annexation of Latvia by the Soviet Union. They were scuttled in Liepāja in June 1941 as the Germans were about to capture the port. The hulls were raised in 1942 and scrapped.

Class overview
Scheme of Ronis-class submarine
Name	Ronis class
Operators	Latvian Naval Forces Soviet Navy
Built	1925–1926
In service	1926–1941
Completed	2
Lost	2
General characteristics
Type	Diesel/electric-powered coastal submarine
Displacement	390 long tons (400 t) surfaced 514 long tons (522 t) submerged
Length	55.0 m (180 ft 5 in)
Beam	4.8 m (15 ft 9 in)
Draught	3.6 m (11 ft 10 in)
Propulsion	2 shafts, 2 Sulzer diesels, 1,300 bhp (970 kW) 2 electric motors 700 shp (520 kW)
Speed	14 knots (26 km/h) surfaced 9 knots (17 km/h) submerged
Test depth	160 ft (49 m)
Complement	27
Armament	6 × 21 in (533 mm) torpedo tubes (2 bow, and 2 × twin external turnable) 1 × 75 mm (3 in) main deck gun 2 × 7.62 mm machine guns