Page 182 - statbility for masters and mates

170 Ship Stability for Masters and Mates
Heel Tabulated GZ Correction to GZ Required GZ (KG 9 m) (GG1 sin heel) (KG 9.3 m)
0
15 0.90
30 2.15 45 2.55 60 1.91 75 0.80 90 0.50
0 0 0 0 0
0.3 0.259 0:08 0.3 0.500 0:15 0.3 0.707 0:21 0.3 0.866 0:26 0.3 0.966 0:29 0.3 1.000 0:30
0:90 0:08 0:82 2:15 0:15 2:00 2:55 0:21 2:34 1:91 0:26 1:65 0:80 0:29 0:51
0:50 0:30 0:80
(d) The initial metacentric height.
(e) The moment of statical stability at 25 degrees heel.
For the graph see Figure 16.6(a),
Fig. 16.6(a)
Answers from the curve:
(a) Range of Stability 0 degrees to 81 degrees.
(b) Angle of vanishing stability 81 degrees.
(c) Maximum GZ 2.35 m occurring at 43 degrees heel. (d) GM is 2.30 m.
(e) GZ at 25 degrees heel 1:64 m.
Moment of statical stability W GZ
33 500 1:64
54 940 tonnes m