John Joshua Challis, RNVR
| Birth details unknown |
| Ranks
Decorations |
Warship Commands listed for John Joshua Challis, RNVR
| Ship | Rank | Type | From | To |
| HMS Lord Grey (FY 1593) | T/Lt. | MS Trawler | mid 1943 | Oct 1944 |
| HMS MMS 109 (J 609) | T/Lt. | Motor minesweeper | 14 Mar 1945 | 20 Dec 1945 |
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