Page 218 - statbility for masters and mates

206 Ship Stability for Masters and Mates
Fig. 21.1(c)
Example 2
A box-shaped vessel is 150 metres long 24 metres wide 12 metres deep and is ¯oating on an even keel at 5 metres draft. GM 0.9 metres. A compartment amidships is 20 metres long and is empty. Find the new GM if this compartment is bilged.
Old KB 12 Old draft 2:5 m
Old BM B2=12d 24 24
12 5 9:6m
Old KB 2:5 m OldKM 12:1m Old GM 0:9 m
KG 11:2m
This KG will not change after bilging has taken place.
x v A a
20 24 5 150 24 20 24
2400 130 24
Increase in draft 0:77 m Old draft 5:00 m
New draft 5:77 m say draft d2