A tug, or a tugboat is a special class of boat without which mega-ships cannot get into a port.
It helps in the mooring or berthing operation of a ship by towing or pushing a vessel towards the port.
Tug boats can also be engaged to provide essentials, such as water, supplies, etc., to the vessel.
Tug boat eases the maneuvering operation of vessels by forcing them towards the port.
Tug boats have become essential for non-self-propelled barges, oil platforms, log rafts etc.
These are small, rather powerful boats due to their strong structural engineering.
These can also have fire fighting accessories to provide fire fighting assistance in ports.
Tug boats are known for their moderate draft, and can carry about 6 to 8 passengers or guests.