SUB-COMMITTEE ON STABILITY AND LOAD LINES AND ON ...

Ref.: 391/09 and 520/09
BSU
Bundesstelle für Seeunfalluntersuchung
Federal Bureau of Maritime Casualty Investigation
Figure 16: Framing plan
The calculations at the TUHH were made using the E4 calculation software.
Deviations from the shipboard computer on the basis of the different software in the
order of 2 cm for the draught and 4 cm for the GM are negligible.
3.2.8.1 Calculation of the longitudinal strength and stability
The accuracy of the shape of the vessel and load condition were recorded sufficiently
via the simulation and, as with the load computer, the calculations of the TUHH have
revealed that the longitudinal bending moments at frames 104 and 125 are
significantly exceeded. Accordingly, in formal terms the vessel should not have set
sail. The permissible loads were adhered to for the port condition, but not for the socalled
'sea-going condition'. To maintain the longitudinal strength, the vessel should
have taken on additional ballast water; however, this would have meant that her
stability would have been even higher. During the calculation, special emphasis was
placed on the interaction between longitudinal strength and stability, especially when
the vessel was moving with ballast. At the same time, an examination was to be
made on whether practicable technical possibilities exist at all for ballasting a modern
container vessel without cargo so that a seaworthy condition is established from the
perspective of stability.
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