| Navy | The Royal Navy |
| Type | MS Trawler |
| Class | Lake |
| Pennant | FY 239 |
| Built by | Smith's Dock Co., Ltd. (South Bank-on-Tees, U.K.) |
| Ordered | |
| Laid down | 7 Jul 1939 |
| Launched | 31 Aug 1939 |
| Commissioned | 7 Nov 1939 |
| End service | |
| Loss position | |
| History | Lent to the United States Navy in March 1942. |
| Former name | HMS Grassmere, Kos XXVIII |
We don't have any commands listed for HMS Wastwater (FY 239)
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