As far as possible, ITTC standard symbols and SI units have been used. Exceptions are accordingly defined.

　

　

　

 In case of Y'rT the least squares fitting according to a modified approach, according to Clarke et al. (1983) the parameter B/T was added, showed the following result:

　

　

 The belonging scatter plot of Fig. 6 shows an unsatisfactory spread of data. In order to improve the approach a regression analysis, without presetted parameters like B/L and B/T, was performed. The result is as follows:

　

　

 Fig. 7 shows that the standard deviation is reduced from σ=1.62・10^-3 to 1.43・10^-3. However, the spread shown is still not fully satisfying.

　

 In a third attempt the formal structure of Eqs. (7), (12) and (13) incorporating the sway coefficient Y'vγ was discarded. However, an ordinary regression analysis with global hull and distinct aft body parameters was performed.

　

　

 Fig. 8 shows that compared to Eq. (13) no improvement can be observed. However, judging the results for Y'rT it has to be kept in mind that the coefficient Y'r always has to be seen in relation with the mass term m' which is obviously prevailing, see Eqs. (24) and (25).