TAILIEUCHUNG - Seamanship Techniques 2011 E Part 12

Tham khảo tài liệu 'seamanship techniques 2011 e part 12', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Emergencies 143 out the boats and make survival craft ready for launch without being hindered by frightened people. Roll on roll off Vessels The essential feature of this type of vessel is the large amount of open space on the vehicle decks and the main danger if the stowage area is holed to any extent that the speed with which water may flood the vessel could be critical. The time in which to take the decision to abandon the vessel and launch survival craft will be limited. The design of these vessels is generally such that they have a very large GM compared with the conventional type of vessel. They also tend to have large freeboards with vehicle decks situated higher than the waterline. All these features reduce the risk of being holed below the waterline and in the stowage spaces but the possibility always exists especially if a vessel has grounded and the double bottom tanks and the tank tops have been pierced allowing water to penetrate direct into the stowage areas. A speedy assessment of damage would be essential with a roll on roll off vessel and once the decision to abandon has been taken then swift positive action would be required from all personnel. Abandoning the vessel by bow and stern doors as well as by shell doors should not be ruled out if the circumstances of the case admit and if a source of power to operate them is still available. Individual abandonment should be avoided in view of the high freeboard unless no alternative is left. Use should be made of disembarkation ladders lifelines to boats etc. as a realistic alternative to direct entry into the water from the freeboard deck upper deck . Scrambling Nets Nets could be usefully employed in many types of rescue especially on high freeboard vessels and where there are large numbers of people to consider. Nets may not always be available at short notice and improvisation in the way of gangway or cargo nets may be a useful alternative. When nets or other similar rescue equipment is to be used .

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