Gabriel Marine Construction & Dredge LLC, Algonac, MI
Gaelic Tugboat Co., Detroit, MI
Galcon Marine Ltd., Toronto, ON
Gardiner Marine, Richards Landing, ON
Gillen Marine Construction LLC, Mequon, WI
Gordon’s Shoreline Marine, Sarnia, ON
Grand River Navigation Co., Traverse City, MI
Great Lakes Dock & Materials LLC, Muskegon, MI
Great Lakes Fleet Inc., Duluth, MN
Great Lakes Offshore Services Inc., Port Dover, ON