| Navy | The Soviet Navy |
| Type | Submarine |
| Class | ShCh (Scuka) |
| Pennant | |
| Mod | 1st group (Type III) |
| Built by | Baltiyskiy Zavod (Leningrad, U.S.S.R.) / Yard 189. |
| Ordered | |
| Laid down | 5 Feb 1930 |
| Launched | 6 Nov 1931 |
| Commissioned | 15 Nov 1933 |
| End service | 12 Sep 1945 |
| History | Baltic fleet. Decommissioned on 12 September 1945. |
We don't have any commands listed for USSR ShCh-303
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Notable events involving ShCh-303 include:
12 Jul 1942
ShCh-303 fires two torpedoes against ' what is identified as ' a merchant of 6000 tons south-west of Porkkala, Finland. Both torpedoes missed their target.
19 Jul 1942
ShCh-303 fires a torpedo against ' what is identified as ' a merchant off Ut?, Finland. The torpedo missed its target.
20 Jul 1942
ShCh-303 torpedoed and damaged the German merchant Aldebaran (7891 GRT) south of Uto, Finland in position 59°45'N, 21°24'E.
18 Oct 1942
ShCh-303 fires two torpedoes against ' what are identified as ' a merchant of 10000 tons and a merchant of 8000 tons off Norrk?ping, Sweden. The torpedoes missed their targets.
20 Oct 1942
ShCh-303 fires two torpedoes against ' what is identified as ' a merchant of 8000 tons off Norrk?ping, Sweden. The torpedoes missed their target.
22 Oct 1942
ShCh-303 fires a torpedo against ' what is identified as ' a merchant off Gotska Sand?n Island, Sweden. The torpedo missed its target.
2 Nov 1942
ShCh-303 fires two torpedoes against ' what is identified as ' a merchant off Landsort, Sweden. The torpedoes missed their target.
4 Nov 1942
ShCh-303 fires three torpedoes against ' what are identified as ' a auxiliary patrol vessel and a merchant of 15000 tons off Landsort, Sweden. The torpedoes missed their targets.
5 Mar 1945
ShCh-303 fires two torpedoes against ' what is identified as ' a merchant west-south-west of Libau in position 56°18'N, 19°56'E. Both torpedoes missed their target.
9 Mar 1945
ShCh-303 torpedoed and sank the German merchant Borbeck (6002 GRT) west-south-west of Libau in position 56°21'N, 20°10'E. The wreck of the Borbeck was later destroyed by Soviet aircraft.