Stability – I : Chapter 7

1. A ship of displacement 2000t and KG 4.2m, loads 300t 0f cargo (KG 2.0m ), 200t of cargo (KG 3.2m) and 500t of bunkers ( KG 0m ). Find her final KG.

Solution:

Ship’s weight	KG	VM
2000t (load)	4.2m	3400 tm
300t (load)	2.0m	(+) 600 tm
200t   (load)	3.2m	(+) 640 tm
500t  (load )	1.0 m	(+)500 tm

Final W   = 300t                                                           Final VM = 10140 tm

We know that:-

Final KG =   (Final VM) / (Final W)
Final KG    = 10140 / 3000
= 3.38m

2. A ship of displacement 3000t and KG 3.9m, loads cargo and follows :- 200t in N0.1 LH ( KG 3.0m )300t on the deck ( KG 6.4m ), 150t and NO.3 TD (KG 5.2m ) and 350t in NO.4 LH (KG 4.0m ). Find the final KG .

Solution:

Ship’s weight	KG	VM
3000 t	3.9m	11700tm
200t (load)	3.0m	(+) 600tm
300t	6.4m	(+) 1920tm
150t	5.2m	(+) 780tm
350t	4m	(+)1400tm

Final W   = 4000 t                                                       Final VM = 16400 tm

We know that:-

Final KG =   (Final VM) / (Final W)
Final KG = (16400/4000)
= 4.1m