Captured incomplete on Slip No 4 in Danzig on 30 Mar 45
Schichau Shipyard Hull No: G-1680
95% ready for launching at time of capture
Designated TS-5 on 12 Apr 45
Launched at Danzig in July 1945
Provisionally allocated to the Soviet Baltic Fleet
Moved to Libau (Latvia)
Inspected by TNC in Libau on 8 Oct 45 - still incomplete and with no rudder
Defined in TNC Report on 6 Dec 45 as an “unallocated submarine afloat”
Moved to Kronstadt in late 1945/early 1946
Probably commissioned into the Soviet Navy and used for sea trials/training
Renamed R-1 on 8 Mar 47

Sunk in the Baltic NW of the Cape Ristna Lighthouse in Estonia on 7/8 Aug 47
Struck from Soviet Navy list on 20 Sep 47