| Navy | The Polish Navy |
| Type | Submarine |
| Class | S-1 |
| Pennant | P 551 |
| Built by | Bethlehem Steel Corp. (Quincy, Massachusetts, U.S.A.) |
| Ordered | |
| Laid down | 26 Oct 1918 |
| Launched | 29 May 1920 |
| Commissioned | 4 Nov 1941 |
| Lost | 2 May 1942 |
| Loss position | 71.30N, 12.32E |
| History | Originally the US submarine S-25. She was decommissioned and given to the Royal Navy on 4 November 1941. Because of a shortage of trained submarine crews within the Royal Navy the boat was lent to the Polish Navy which named her Jastrzab (Hawk). Jastrzab (Kapitan Marynarki Boleslaw Romanowski) was mistakenly sunk by the Norwegian destroyer St. Albans and the British minesweeper HMS Seagull in the Norwegian Sea in position 71º30'N, 12º32'E. 5 men died and the Commanding officer survived though wounded. |
| Former name | USS S-25 |
Commands listed for ORP Jastrzab (P 551)
Please note that we're still working on this section.
| Commander | From | To | |
| 1 | Boleslaw Romanowski, ORP | 4 Nov 1941 | 2 May 1942 |
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