NAVYPEDIA

Photo

Shch-311

Ships

Name	No	Yard No	Builder	Laid down	Launched	Comp	Fate
Щ-121 [Shch-121] (ex-Зубатка [Zubatka]), 6.1949- С-121 [S-121]		214	194 Yd (Marti Yd), Leningrad // 202 Yd (Dalzavod Yd), Vladivostok	12.1933	26.8.1934	4.1935	stricken 6.1954
Щ-122 [Shch-122] (ex-Сайда [Sayda]), 6.1949- С-122 [S-122]		251	189 Yd (Ordzhonikidze Yd), Leningrad // 202 Yd (Dalzavod Yd), Vladivostok	12.1933	29.8.1934	4.1935	stricken 6.1954
Щ-123 [Shch-123] (ex-Угорь [Ugor']), 6.1949- С-123 [S-123]		215	194 Yd (Marti Yd), Leningrad // 202 Yd (Dalzavod Yd), Vladivostok	12.1933	26.8.1934	4.1935	stricken 6.1954
Щ-124 [Shch-124] (ex-Палтус [Paltus]), 6.1949- С-124 [S-124]		252	189 Yd (Ordzhonikidze Yd), Leningrad // 202 Yd (Dalzavod Yd), Vladivostok	12.1933	29.12.1934	9.1935	stricken 6.1954
Щ-125 [Shch-125] (ex-Муксун [Muksun]), 6.1949- С-125 [S-125]		217	194 Yd (Marti Yd), Leningrad // 202 Yd (Dalzavod Yd), Vladivostok	12.1933	26.8.1934	5.1936	hulk 8.1953
Щ-204 [Shch-204] (ex-Минога [Minoga])		216/1040	189 Yd (Ordzhonikidze Yd), Leningrad // 200 Yd (61 Kommunar Yd), Nikolayev	6.1934	31.12.1934	12.1935	sunk 6.12.1941
Щ-205 [Shch-205] (ex-Нерпа [Nerpa]), 6.1949- С-205 [S-205]		1029	200 Yd (61 Kommunar Yd), Nikolayev	1.1934	6.11.1934	11.1936	stricken 9.1954
Щ-206 [Shch-206] (ex-Нельма [Nelma])		1030	200 Yd (61 Kommunar Yd), Nikolayev	1.1934	1.2.1935	8.1936	sunk 6-7/1941
Щ-207 [Shch-207] (ex-Касатка [Kasatka]), 6.1949- С-207 [S-207]		1031	200 Yd (61 Kommunar Yd), Nikolayev	1.1934	25.3.1935	11.1936	hulk 9.1954
Щ-306 [Shch-306] (ex-Пикша [Piksha])		250	189 Yd (Ordzhonikidze Yd), Leningrad	11.1933	1.8.1934	8.1935	sunk 16.11.1942
Щ-307 [Shch-307] (ex-Треска [Treska])		249	189 Yd (Ordzhonikidze Yd), Leningrad	11.1933	1.8.1934	8.1935	charging plant 4.1948
Щ-309 [Shch-309] (ex-Дельфин [Delfin])		550/3	112 Yd (Krasnoye Sormovo Yd), Gorkiy	11.1933	10.4.1935	11.1935	stricken 3.1949
Щ-310 [Shch-310] (ex-Белуха [Belukha]), 6.1949- С-310 [S-310]		550/4	112 Yd (Krasnoye Sormovo Yd), Gorkiy	11.1933	10.4.1935	8.1936	stricken 8.1953
Щ-311 [Shch-311] (ex-Кумжа [Kumzha])		550/5	112 Yd (Krasnoye Sormovo Yd), Gorkiy	11.1933	10.4.1935	8.1936	sunk 12.10.1942

Technical data

Displacement standard, t
Displacement normal, t	Shch-121 - 125: 618 / 721 Shch-204 - 207: 610 / 706 Shch-306, 307, 309 - 311: 589 / 708
Length, m	Shch-121 - 125, 204 - 207: 58.8 Shch-306, 307, 309 - 311: 57.8
Breadth, m	6.20
Draught, m	Shch-121 - 125: 4.08 Shch-204 - 207: 4.30 Shch-306, 307, 309 - 311: 3.97
No of shafts	2
Machinery	2 38B8 diesels / 2 PGV-8 electric motors
Power, h. p.	1370 / 800
Max speed, kts	Shch-121 - 125: 11.9 / 6.7 Shch-204 - 207: 12.9 / 7.5 Shch-306, 307, 309 - 311: 12.3 / 8
Fuel, t	diesel oil 58
Endurance, nm(kts)	5350(7) / 100(2)
Armament	Shch-121 - 125, 204 - 207: 2 x 1 - 45/43 21K, 6 - 533 TT (4 bow, 2 stern, 10) Shch-306, 307, 309 - 311: 1 x 1 - 45/43 21K, 2 x 1 - 12.7/79, 6 - 533 TT (4 bow, 2 stern, 10)
Electronic equipment	Merkuriy or Mars-A or Mars-DM or Mars-ShM hydrophone Shch-309: none
Complement	37 - 40
Diving depth operational, m	75

Standard scale images

Graphics

Project history

Well-known "Shchukas" ("pikes"): the most mass series of Soviet WWII-era submarines. They were designed since 1928 as patrol small (later medium) submarines for Baltic. The big effect on the design was rendered by raised British submarine L55 from which there was borrowed architectural type: saddle-tank with bulge tanks, and a hull form. III series submarines differed by only one 45mm gun, all subsequent submarines received two, nevertheless, weakness of artillery armament during war remained one of the main lacks of the project.

Submarines were built in six series, but intra-serial differences were insignificant. Intended for Pacific V series (originally III-bis) were built taking into account requirements to transportation by railways and subsequent assembling; they had other division on compartments, CT form and was built with wide application of welding. On V-bis (originally VII) and V-bis-2 series the light hull and CT form were changed. Maximal diving depth for all series was 90m. Submarines of V-bis-2 and X-bis series differed by the best seaworthiness among all Soviet WWII submarines.

Modernizations

1940 - 1943, some boats among Shch-121 - 125, 204 - 207: - 1 x 1 - 45/43; + 1 x 1 - 12.7/79

1940-1941, Shch-206, Shch-306, Shch-310, Shch-311; 1941-1942, Shch-205, Shch-207, Shch-307, Shch-309; 1940-1943, Shch-121, Shch-122, Shch-123, Shch-124, Shch-125: - hydrophone; + Mars-12 hydrophone

early 1941, Shch-204: - 2 x 1 - 45/43; + 1 x 1 - 100/49 B-24.

1942 - 1945, Shch-122, Shch-123, Shch-125: + 20 mines

1944, Shch-205; 1945, Shch-121, Shch-124, Shch-310: + type 129 sonar

Naval service

Shch-204 was lost 6.12.1941 on a mine at Varna. Shch-206 presumably was sunk 9.7.1941 by Romanian torpedo boat Naluca and MTBs S of Constanza. Shch-306 was lost between 13 and 16.11.1942 between Nargen and Porkkala, possibly, on a mine. Shch-311 was lost presumably 12.10.1942 on a mine at Big Tyuters Island (Gulf of Finland).