Page 163 - statbility for masters and mates

MCT 1 cm 2583 71:42 100 60
MCT 1 cm 30:75 t m/cm
d L MCT 1 cm
Trim 151
l TPCSW 60 30:75 1
30 6:15 d 10 metres from LCF
LCF is at amidships.
Ans. Load the weight 10 metres forward of amidships.
Loading a weight to produce a required draft
Example
A ship 150 metres long arrives at the mouth of a river with drafts 5.5m F and 6.3 m A. MCT 1 cm 200 tonnes m. TPC 15 tonnes. Centre of ¯otation is 1.5 m aft of amidships. The ship has then to proceed up the river where the maximum draft permissible is 6.2 m. It is decided that SW ballast will be run into the forepeak tank to reduce the draft aft to 6.2 m. If the centre of gravity of the forepeak tank is 60 metres forward of the centre of ¯otation, ®nd the minimum amount of water which must be run in and also ®nd the ®nal draft forward.
e Fig. 15.12
(a) Load `w' tonnes at the centre of ¯otation.
Bodily sinkage w TPC
w cm 15
Newdraftaft 6:3m w cm I 15