TAILIEUCHUNG - Intro to Naval Architecture 3E Episode 12

Tham khảo tài liệu 'intro to naval architecture 3e episode 12', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Accommodation SHIP DFSIGS Figurr 12 2 Container ship f- igurr Roll on roli oft ship SHIP DESIGN 822 SHIP DESIGN The cargo-carrying section of the ship is a large open deck with a loading ramp usually at the after end. Internal ramps lead from the loading deck to the other tween deck spaces. The cargo may be driven aboard under its own power or loaded by straddle carriers or fork lift trucks. One or more hatches may be provided for containers or general cargo served by deck cranes. Where cargo with or without wheels is loaded and discharged by cranes the term lift-on lift-off Lo-Lo is used. The structure outboard of the cargo decks is a box-like arrangement of wing tanks to provide longitudinal strength. A double bottom is fitted along the complete length. The machinery space and accommodation are located aft. Only a narrow machinery casing actually penetrates the loading deck. Sizes range considerably with about 16000dwt 28 000 displacement tonne being quite common. High speeds in the region of 18 to 22 knots are usual. When used as ferries vehicles usually enter at one end and leave at the other. This speeds up loading and unloading but requires two sets of doors. There has been considerable debate on the vulnerability of Ro-Ro ships should water get on to their vehicle decks. Various means of improving stability in the event of collision and to cater for human error in not securing entry doors have been proposed. Since the loss of the Herald of Free Enterprise regulations have been tightened up. The later loss of the Estonia gave an additional impetus to a programme of much needed improvements. Bulk cargo carriers Oil tankers Oil tankers in particular crude carriers have significandy increased in size in order to obtain the economies of scale and to respond to the demands for more and more oil. Designations such as ƯLCC Ultra Large Crude Carrier and VLCC Very Large Crude Carrier have been used for these huge vessels. Crude oil tankers with deadweight .

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