Page 156 - statbility for masters and mates

144 Ship Stability for Masters and Mates
Change of trim Change of draft aft
Change of draft aft Change of draft forward Change of draft forward
58:3 cm by the stern Ll Change of trim
12 58:3 cm 29:15 cm
12 58:3 29:15 cm
Original drafts Bodily rise
Change due trim Ans: New drafts
2:000 m A 0:140 m
1:860 m 0:290 m
2:150 m A
2:000 m F 0:140 m 1:860 m 0:290 m
1:570 m F
Example 3
A ship 100m long arrives in port with drafts 3m F and 4.3m A. TPC 10 tonnes. MCT 1 cm 120 tonnes m. The centre of ¯otation is 3 m aft of amidships. If 80 tonnes of cargo is loaded in a position 24 m forward of amidships and 40 tonnes of cargo is discharged from 12 m aft of amidships, what are the new drafts?
Cargo loaded Cargo discharged Net loaded
e
Fig. 15.8
80 tonnes 40 tonnes 40 tonnes
Bodily sinkage w TPC
40 10
Bodily sinkage 4 cm To ®nd the change of trim take moments about the centre of ¯otation.