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

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SLF 54/INF.10 Page 2 Observation 4 In addition to the increasing number of "lessons" learned, there seems to be a growing need to address the whole issue in a satisfactory manner. Revisiting previous submissions to this Sub-Committee, Germany would like to quote again two paragraphs from its previous document submitted in 2005 (SLF 48/4/8). "Recent accidents with large container ships have shown that dangerous situations from heavy rolling can also occur in head seas at slow speed, a situation that has traditionally been considered as safe and suitable for riding out a severe storm. Parametric resonance has been found as the explanation for the heavy rolling in this situation. Excessive stability has become a frequent occurrence on container ships and ro-ro ships designed for large deck loads, when operating in part deck load conditions. This condition makes those ships vulnerable in beam seas due to the risk of harmonic resonances." 5 Unfortunately, the then described observation of excessive stability causing safety problems is still valid. The latest related file covers two accidents: one occurred on 15 September 2009 on the CMV CCMI GUAYA off Hong Kong, and the other on 16 October 2009 CMV FRISIA LISSAB<strong>ON</strong> off Borkum on the Westerems, with observed high accelerations (excessive stability). The report is attached in the annex. 6 This matter continues to cause great concern in Germany. Action requested of the Sub-Committee 7 The Sub-Committee is invited to consider the information provided and take action as appropriate. *** I:\SLF\54\INF-10.doc
SLF 54/INF.10 Annex, page 1 ANNEX I:\SLF\54\INF-10.doc
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