Stability – I : Chapter 7

3. A ship of load displacement 10,000 t, KG 6.0m, discharge cargo of 250t ( KG 3.0m ) and 150t ( KG 4.0m). Find her final KG.

Solution :

Ship’s weight	KG	VM
10000t	6.0m	60000 tm
(-) 250t (discharge)	3.0m	(-) 750 tm
(-) 150t (discharge)	4.0m	(-) 600 tm

Final  W  =  9600t                                                 Final  VM = 58650 tm

We know that:-

Final KG =   (Final VM) / (Final W)
Final  KG  = (58650 / 9600)
= 6.109m.

5. Ship of 2000t displacement of KG 3.66m , loads 1500t( KG5.5m ) 3500t (KG 4.60m ), and takes 1520t of bunkers (KG 0.60m ). She discharge 2000t cargo ( KG 2.44m ). and consume 900t of bunkers ( KG 0.40m ). Find the KG at the and of the voyage.

Solution :

Ship’s   weight	KG	VM
2000t	3.66m	7320tm
1500t(load)	5.5m	(+)8250tm
3500t (load)	4.60m	(+)16100tm
1520t ( load)	0.60m	(+)912tm
2000t ( discharge)	2.44m	(-) 4880tm
900t  (discharge)	0.40m	(-)360tm

Final W   =   5620t                                                    Final VM  = 27342tm

We know that:-

Final KG =   (Final VM) / (Final W)
Final KG = (27342) / (5620)
= 4.865m