3.6 Determination of l_w1

  3.6.1 The heeling moments evaluated by wind tests, M_wind , and drifting tests, M_water , were substituted into equation (N-3.7) (the same as equation (1.1) of the Guidelines) and the wind heeling lever, l_w1 , was calculated as a function of heel angle as shown in figure 3.7 and figure 3.8.

  3.6.2 In figure 3.7, the heeling levers due to wind (M_wind / Δ ) and drift motion ( water M_water/ Δ ) are also included. In both figures, l_w1 at angles greater than 30° is assumed to keep the same value as at 30° (see paragraph 1.6 of the Guidelines). Figure 3.7 shows that, in the considered case, the wind heeling lever estimated by using the complete procedure, i.e. by using wind and drift tests, is sensibly smaller than that required by the standard weather criterion.