Small tug

By KaranC In: Types of Ships Last Updated on November 8, A tug or more commonly a tugboat is a secondary boat which helps in mooring or berthing operation of a ship by either towing or pushing a vessel towards the port. A tug is a special class of boat without which mega-ships cannot get into a port. Along with the primary purpose of towing the vessel towards the harbour, tug boats can be engaged in the purpose of providing essentials such as water, air, etc. Tug boat eases the manoeuvring operation of vessels by forcing or tugging them towards the port. Mega vessels can never be manoeuvred by their own.
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What are Tug Boats?

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Seagoing[ edit ] Fleet tug USS Tawasa 1, tons, ft which towed a nuclear depth charge as it was detonated in Operation Wigwam in Seagoing tugs deep-sea tugs or ocean tugboats fall into four basic categories: The standard seagoing tug with model bow that tows by way of a wire cable or on a rope hawser. These are known in the industry as "rope boats" or "wire boats. This configuration is dangerous to use with a barge which is "in ballast" no cargo or in a head- or following sea. Therefore, "notch tugs" are usually built with a towing winch. With this configuration, the barge being pushed might approach the size of a small ship, with the interaction of the water flow allowing a higher speed with a minimal increase in power required or fuel consumption. The "integral unit", or "integrated tug and barge" ITB , comprises specially designed vessels that lock together in such a rigid and strong method as to be certified as such by authorities classification societies such as the American Bureau of Shipping , Lloyd's Register of Shipping , Indian Register of Shipping , Det Norske Veritas or several others. These units stay combined under virtually any sea conditions and the tugs usually have poor sea-keeping designs for navigation without their barges attached.
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