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发表于 2007-11-14 23:01
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来自: 中国上海
With regard to AHTS, Bollard Pull test is very complicated & strict because it is very closely related to vessel leasing marketing price. Possibly the minus influence from the shallow water depth shall be taken account of in case BP is more 180t or draught is more that 6m.
AHTS building is difficult, the main factors as follows,
1) too complicated Pipings for the cargo & function; hydraulic pipes the same
2) DP system, which depends upon the grade(1,2,3)
3) others focuses based on the notations |
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