Built in 1954 by Missouri Valley Bridge & Iron Works, this handsome tug began life for the U.S. Army as their ST-1999. In 1961 she went to the U.S. Army Corps of Engineers and was renamed Au Sable. In 1984, she was retired from the Corps and donated to a non-profit that turned out to be scam. She was renamed Challenger, but the Corps took her back the following year and re-sold her at auction to Billington Contracting of Duluth, MN. Durocher purchased the Challenger in 1987, renaming her General.
General remains busy in the construction and contracting trades for Kokosing, based out of Cheboygan, MI on Lake Huron.
- Type: Single Screw Tugboat
- Year Built: 1954
- Builder: Missouri Valley Bridge & Iron Works, Leavenworth, KS
- Hull No.: C-1304-12
- Horsepower: 960 bhp
- Length: 71′ 00″
- Breadth: 19′ 06″
- Depth: 10′ 00″
- Port of Registry: Cheboygan, MI