Page 242 - statbility for masters and mates

230 Ship Stability for Masters and Mates
where
Example
Will a homogeneous log 6 m 3 m 3 m and relative density 0.4 ¯oat in fresh water with a side perpendicular to the waterline? If not, what will be the angle of loll?
y the angle of loll,
GM a negative initial metacentric height, and
BM the BM when upright.
Fig. 24.3
Since the log is homogeneous the centre of gravity must be at half-depth, i.e. KG 1.5m.
Draft of log Depth of log
SG of log SG of water
Draft of log
d
KB
3 0:4 1
1:2 m 12 draft
0:6m
KB BM
B2=12d 3 3
12 1:2 BM 0:625m

KB 0:600m KM 1:225m KG 1:500m
GM 0:275 m