Inland Waterways: Towboats on the rivers: Do they need/carry engineers?

The line haul towboats have always carried engineers, though not always licensed but guys who came up through the ranks and know what they are doing. Companies operating smaller boats generally do not. Not that they are necessarily bad companies, just that there is much less equipment to maintain on a boat with a pair of GM 871’s pushing 2 barges than a lower mississippi boat with 16 cyl turbo’s pushing 30 or so barges.