A tugboat (tug) is a boat that maneuvers vessels by pushing or towing them. Tugs move vessels that either should not move themselves, such as ships in a crowded harbor or a narrow canal, or those that cannot move by themselves, such as barges, disabled ships, log rafts, or oil platforms. Tugboats are powerful for their size and strongly built, and some are ocean-going. Some tugboats serve as icebreakers or salvage boats. Early tugboats had steam engines, but today most have diesel engines. Many tugboats have firefighting monitors, allowing them to assist in firefighting, especially in harbors.
Seagoing tugboats (or ocean tugboats) fall into four basic categories:
Tugs (stylized as TUGS) was a British children's television series first broadcast in 1988. It was created by the producers of Thomas the Tank Engine & Friends, Robert D. Cardona and David Mitton. The series deals with the adventures of two anthropomorphized tugboat fleets, the Star Fleet and the Z-Stacks, who compete against each other in the fictional Bigg City Port.
The series was set in the Roaring Twenties, and was produced by Tugs Ltd., for Television South (TVS) and Clearwater Features Ltd. The music was composed by Junior Campbell and Mike O'Donnell, who also wrote the music for Thomas & Friends.
Due to the bankruptcy of Television South, the series did not continue production past 13 episodes. Following the initial airing of the series throughout 1989, television rights were sold to an unknown party, while all models and sets from the series sold to Britt Allcroft. Modified set props and tugboat models were used in Thomas & Friends from 1991 onwards, with footage from the original program being heavily dubbed and edited for use in the American children's series Salty's Lighthouse.