Appendix 2 – Explanatory Notes to the Free Surface Calculation With Varying Free Surface Moments, Actual Liquid Transfer Moments, Taking Into Account Actual Heel and Trim, Depending on the Interval Angles of the GZ Curve
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Statutory Documents - IMO Publications and Documents - Circulars - Maritime Safety Committee - MSC.1/Circular.1461 – Guidelines for Verification of Damage Stability Requirements for Tankers – (08 July 2013) - Annex – Guidelines for Verification of Damage Stability Requirements for Tankers - Appendix 2 – Explanatory Notes to the Free Surface Calculation With Varying Free Surface Moments, Actual Liquid Transfer Moments, Taking Into Account Actual Heel and Trim, Depending on the Interval Angles of the GZ Curve

Appendix 2 – Explanatory Notes to the Free Surface Calculation With Varying Free Surface Moments, Actual Liquid Transfer Moments, Taking Into Account Actual Heel and Trim, Depending on the Interval Angles of the GZ Curve

 In the figure below it is shown that the free surface moments can be reduced significantly, depending on the filling level and on the heel. Therefore calculations according to the actual liquid transfer moment represent a more realistic situation. In cases where the effect of free surfaces has a significant impact (i.e. large tanks) this method provides a more realistic account and can be used for the calculations of damage stability.

Parent topic: Annex – Guidelines for Verification of Damage Stability Requirements for Tankers
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