Car-trailer connection, 6 letters
Item connecting motor home & trailing car (3,3), 6 letters
Trailer attachment, 6 letters
Wrecker's device, 6 letters
Harbor vessel, 7 letters
River tug, 7 letters
Vessel that pushes groups of barges on inland waterways, 7 letters
A powerful small boat designed to pull or push larger ships, 7 letters