Warren Boat Yard
Warren RI
As far as I can tell from the sparse records, the Warren Boat Yard which was active during WWII was established in 1939 on the site of Alder Manufacturing. One of the founders of Warren BY was Ernest E. Alder, of Alder Manufacturing, who, earlier in his career, had been the Wood Superintendent at Herreshoff Manufacturing. Warren Boat Yard closed after the war and its entire output appears to have been the eight boats listed below.
| O/N | Name | Customer | Type | LDT | LOA | Delivered | Notes | |
| 252394 | Heroic (AMc-84) | US Navy | minesweeper | 205 | 97 | 25 Mar 1942 | sold 1946 as Elizabeth B | |
| Ideal (AMc-85) | US Navy | minesweeper | 205 | 97 | 24 Apr 1942 | sold 1946 | ||
| 255678 | APC-11 | US Navy | coastal freighter | 147 | 103 | 1942 | sold 1947 as Isabel Rose, foundered in Fiji 1964 | |
| APC-12 | US Navy | coastal freighter | 147 | 103 | 1942 | transferred overseas | ||
| APC-51 | US Navy | coastal freighter | 147 | 103 | 1942 | to Britain, returned, transferred overseas | ||
| APC-52 | US Navy | coastal freighter | 147 | 103 | 1942 | to Britain, returned, transferred overseas | ||
| APC-53 | US Navy | coastal freighter | 147 | 103 | 1942 | to Britain, returned, transferred overseas | ||
| APC-54 | US Navy | coastal freighter | 147 | 103 | 1942 | to Britain, lost 1946 |