M/V Robert W. is a tugboat that was built by the Russel Brothers Ltd. shipbuilding company in Owen Sound, Ontario, in 1948. The tug is 60 feet long, 16 feet wide, 8 feet 4 inches in depth, and of 48.5 gross tons. It was originally powered by two Cummins NHMS 6-cylinder marine diesel engines originally producing 175 hp each but has been repowered with 2 cummins model NT380M marine engines producing approximately 400 BHP each; the tug originally had a Sheppard 32-volt DC diesel generator for auxiliary power but has been replaced in the mid-1990s with a Lister Diesel model ST2 2-cylinder air-cooled diesel 120-volt AC generator. It was built in 1948 for the Long Lac Pulp & Paper Co. Ltd in Toronto, Ontario, until purchased by Thunder Bay Marine Services in Thunder Bay, Ontario, in 1990.In 2 lo