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

  1. 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

  1. 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.

About the author

Amit Sharma

Graduated from M.E.R.I. Mumbai (Mumbai University), After a brief sailing founded this website with the idea to bring the maritime education online which must be free and available for all at all times and to find basic solutions that are of extreme importance to a seafarer by our innovative ideas.

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