The GNOTS towboat Kool Cat, one of the firm's current eight-boat fleet, pushing loads on the MIssissippi. The big 8,000 HP line haul boats that bring loads of grain down the Mississippi River in rafts of 30 or more 195x35-foot barges are dependent on the smaller fleeting boats to take off individual barges from the tow for delivery to moorings along the river known as fleets. These fleets are composed of a series of pilings to which barges can be moored as they await further movement to grain elevators or directly for loading to ships moored in the river?s stream.?