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.