Page 197 - statbility for masters and mates

Example 1
Find the water pressure and the total thrust on the ¯at plate keel of a ship which is ¯oating on an even keel at 4 metres mean draft in water of density 1.024 t/ m3 per cu. m. The keel plate is 35 m long and 1.5 m wide.
Pressure 4 1:024 4:1 tonnes/m2 Total Thrust w A h
1:024 35 1:5 4 Total Thrust 215:04 tonnes
Water pressure 185
Example 2
Fig. 18.1
A lock gate which is 15m wide has salt water on one side to a depth of 8m and fresh water on the other side to a depth of 9 m. Find the resultant thrust on the lock gate and state on which side of the gate it acts.
Fig. 18.2