2.1 Time required from commencement of cross-flooding to the final equilibrium :
2.2 Time required to bring the ship from any angle of heel to the final equilibrium :
2.3 Time required from commencement of cross-flooding until any angle of heel is achieved:
2.4 Dimensionless factor of reduction of speed through an equalization device, being a function of bends, valves, etc., in the cross-flooding system:
where F is not to be taken as more than 1.
Values for k can be obtained from appendix 2 or other appropriate sources.
2.5 Cross-flooding through successive devices of different cross-section:
If the same flow crosses successive flooding devices of cross-section S1, S2, S3… having corresponding friction coefficients k1, k2, k3…, then the total k coefficient referred to S1 is:
2.6 If different flooding devices are not crossed by the same volume, each k coefficient should be multiplied by the square of the ratio of the volume crossing the device and the volume crossing the reference section (which will be used for the time calculation):
2.7 For cross-flooding through devices in parallel that lead to the same space, equalisation time should be calculated assuming that:
S · F = S1 · F1 + S2 · F2 + …
With for each device of cross-section Si