Towboats that I have seen or met.
Small towboat, TENNESSEE PERL
Small towboat with spud barge.
The LOUISVILLE is a larger towboat used to bring asphault barges up river.
The AMERICAN PILLAR is a larger, triple screw line-haul towboat.
Forty-barge tow, which is typical on the lower Mississippi.
Shipping by barge is MUCH more efficent and environmently friendly.