Regarding the yaw damping coefficient N'vT Clarke and Horn explicitly introduced the Munk moment N'vT(Munk), Eq. (8). In an ideal(non-viscous) fluid the corresponding yaw moment in horizontal motion is as follows:

　

　

 In Eq. (15) the last term uv, which is generally destabilizing and increasing the angle of attack (drift angle), is the so-called Munk moment. It plays a dominant role in manoeuvring dynamics. In context of the present investigation the following expression has to be identified:

　

　

 Regarding the sway added mass a normal regression analysis was performed first. The analysis showed a clear dependency on the horizontal added mass coefficient (CH)as with a proportional factor of nearly 1. For that reason (CH)as was withdrawn from the regression and kept constant. Ultimately the following expression was identified:

　

　

 Fig. 9 displays the corresponding scatter plot, and it can be seen that Eq. (17) describes the sway added mass term very well.

　

　

 Regarding the longitudinal added mass term the following linear equation was introduced:

　

　

 Similar to the term Y'rT also for the yaw moment term Y'vT three different approaches were investigated. First, strictly conform to the approach of Clarke and Horn (1997) the following result was obtained:

　

　

 Second, the formal structure incorporating the sway coefficient Y'vT was abandoned. This lead to the following. result:

　

　

 Third, the definite consideration of the Munk moment was given up and a regular regression analysis with global hull and distinct aft body parameters was carried out.

　

　

 The scatter plots belonging to Eqs. (19), (20) and (21) can be found in Figs. 10 to 12. From the proven standard deviation σ it can be seen that the original approach of Clarke and Horn (1997), Eq. (19), gives the closest fit.