Examination of the intact stability and the seakeeping behaviour

4 Examination
4.12 Vessel No. 12
Figure 4.23: Lines plan and lateral areas of Vessel No. 12
Table 4.23: Main dimensions of Vessel No. 12
Main dimensions Value Unit
L pp 249.03 [m]
B 32.20 [m]
T D 11.30 [m]
Containers 4,300 [TEU]
Vessel No. 12 has the geometric capacity to carry 4, 300 T EU. Having the main dimensions
according to table 4.23, it is another midsized container vessel which may travel through the
Panama Canal. The vessel is comparable to Vessel No. 07, which has nearly the same
dimensions, a slightly smaller c B value and therefore a ner hullform as well as a smaller geometric
TEU capacity. The following characteristics of Vessel No. 12 are to be noted:
ˆ The lines of the ship shown in gure 4.23 have a c B value of 0.65 on design draft.
ˆ The documented bilge keel area is signicant smaller than the mean value according to
chapter 3.9.
ˆ The stability in ballast arrival loading condition is moderately high resulting in a
GM solid = 7.18 m.
ˆ The limiting intact stability criterion (Max. GZ at 25 ◦ ) requires a GM min = 1.28 m.
The calculated transversal accelerations on the bridge and the rolling angles for the three accident
conditions are listed in table 4.24.
Table 4.24: Results of the seakeeping calculation for Vessel No. 12
Accident
[
a
situation t max m/s
2 ] ϕ max [ ◦ ]
Situation 1 10.5 25
Situation 2 11.0 26
Situation 3 14.0 35
The maximum acceleration occurs for accident situation 3. The maximum acceleration is
higher, than for the comparable Vessel No. 07. The statistical distribution of the transversal
accelerations in this situation is shown in gure 4.24.
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