2.Container ships.pptVIP

* * * * * * * * * * * * * * * * Container ships Container ships Designed to be capable of carrying all of its cargo in unitised containers The feature of such a type vessel is to reduce cargo-handling cost through the concept of unit transport technique. Compared to general cargo ships, cargo can be loaded and unloaded several times more quickly in a container ship. Ever since its introduction, container ships have taken over much of the goods carried by general cargo ships. The cargo is transported by road, river, rail and sea while remaining inside the box (container). The Container (box) Containers come in a number of standard sizes 20ftx8ftx8ft is the typical TEU (Twenty foot Equivalent Unit) 40ftx8ftx8ft is the FEU (forty foot container) Typical 20-foot container ISO Container – different sizes Tank containers Liner and feeder services These ships are on a regular schedule to major ports, known as liner service. The containers are then transshipped at these ports to smaller ports by feeder (smaller) vessels. Features of container ship A well flared bow with high forecastle is provided to prevent water from coming on deck. Container ships usually have a fine hull so as to reduce resistance when moving through water Speeds are 18 to 24 knots, or higher Well-flared bow Cells in container ship In container ships, containers are stored in cells plumbing directly down through a multiple array of hatches and in a guided arrangement so that they are mutually secured together. Containers are stored several tiers above the deck also to increase the carrying capacity. Loss of deck due to large hatches The main deck is devoted almost entirely to hatch openings throughout its length and breadth. To compensate for the loss of strength on the deck due to limited deck plating, longitudinal box girders and wing tanks are provided along its length Model of Midship section Box girders, cellullar guides into holds * * * * * * * * * * * * * * * * * * * * * * * * * *