is a small, powerful and strongly-built marine vessel, designed to manoeuvre large ocean
-going ships to be able to dock at port
. They are also used to tow barges
, disabled ships
, or other equipment.
Tugboats are usually powered by large diesel engines, which typically provide the ship with 750 - 3000 horsepower. Most tugboats are less than 40 metres long, but they can be as large as 70 metres.
The hull of a tugboat is resilient, and is often padded with tyres to protect in from collision damage.
The powerful engine, and tough construction, make conversion into a type of ice breaker[?] easy.
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