Page 328 - statbility for masters and mates

316 Ship Stability for Masters and Mates
Fig. 37.2
water. Assume salt water density is 1.025t/m3. Assume fresh water density 1.000 t/m3.
(a) To Find the Position of B1
BB1 v gg1
V
v 1 1 36 4 gg1 2 36 V 36 4 3 223
432 cu. m
Because the angle of trim is small, BB1 is considered to be the horizontal component of the shift of the centre of buoyancy.
Now let the pontoon enter fresh water, i.e. from rSW into rFW. Pontoon will develop mean bodily sinkage.
(b) To Find the New Draft
36 cu. m gg1 24 m ; BB1 36 24
In Salt Water In Fresh Water.
Mass Volume Density 36 4 3 1:025
Mass Volume Density ; Volume Mass
432 2m
Density
36 4 3 1:025 cu. m
1:000
(Mass in Salt water Mass in Fresh Water)