Inland Waterways
Duluth MN
This shipyard was developed to build sub chasers, but only built four before folding. Did they build anything else? The yard was at 1000 Minnesota Avenue, where the Park Point Marina is today, immediately north of the Coast Guard station.
| Name | Customer | Type | LOA | Tons | Delivered | Notes | |
| SC-670 | US Navy | subchaser | 110 | 136 | 2 Aug 1942 | to USCG 1945 as Air Grayleg (WAVR-425) | |
| SC-671 | US Navy | subchaser | 110 | 136 | 19 Oct 1942 | to MARAD 1945 | |
| SC-1059 | US Navy | subchaser | 110 | 136 | 27 Feb 1943 | to MARAD 1946 | |
| SC-1060 | US Navy | subchaser | 110 | 136 | 24 Apr 1943 | to the USSR 1945 as BO-317 |