Stability -I : Chapter 1

Total ullage = (1 +0 .5)
                          = 1.5m.
  1. A rectangular tank has a total depth of 21m and volume of 20600 m3, which includes of trunkway of depth 1m and volume 600m3. find the ullage when 16320 t of oil of RD 0.8 is loaded.
Given :

The total depth of tank =21m
Volume of the tank = 20600m3
The height of the trunkway = 1m
Volume of the trunkway =  600m3
Oil loaded = 16320t
RD= 0.8qes 8


The height of the tank = (21-1)
= 20m

Volume of the tank= (20600 – 600)
 =20000m3

Area of tank = (20000 /20)
=10000m2

Volume of the oil = (mass /density)
=(1620 /0.8)
= 20400 m3

Hence, Volume of the oil inside the trunkway = (Total volume of the oil – volume of the tank)
= (20400 – 20000)
 =400m3

Depth of the oil = (volume /area)
= (400/600)
 = 0.66m

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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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