C L DUBEY – EXERCISE – 08 (DRY DOCKING)

	Fwd	Aft
Draft	3.400m	5.800m
	-0.166m	-0.166m
	+0.783m	-0.834m
	4.017m	4.800m

Therefore, Draft = 4.017m fwd
                                   = 4.800m aft

8. A vessel of length 180m, displacement : 11000t, LCF : 80m, TPC : 22t, MCTC : 155tm, KM : 7.2m, KG : 6.8m, at a draft of F : 6.10m, A : 6.70m, is dry docked. Calculate her residual GM and the drafts F & A at the critical instant.

Solution –

P = 60 ⨯ 155/80
= 116.25 tonnes
Old GM = 0.4m

GG₁ = P ⨯ KM/W
= 116.25 ⨯ 7.2/11000
= 0.076m

New GM = (old GM – GG₁)
New GM = 0.324m

Corn to aft draft = 0.6 ⨯ 80/180
= 0.267m

Hd (Hydrostatic draft )= 6.433m
Rise = 116.25/2200
= 0.053m