Page 413 - statbility for masters and mates

Appendix VI
Specimen examination
papers
Supplied kindly by Scottish Quali®cations Authority (SQA) in Glasgow.
CLASS 5 DECK OFFICER
General Ship Knowledge
2 hours. Attempt all questions. Marks for each question are shown in brackets.
1. A vessel has a Light Ship Displacement of 1625 tonnes. The vessel loads
175 tonnes of fuel oil
60 tonnes of fresh water
375 tonnes of steel
910 tonnes of general
555 tonnes of pipes on deck
The effect of free surface is 350 tonne metres
On the Simpli®ed Stability Information sheet provided (Worksheet Q. 1),* plot the condition of the vessel's stability and state whether the vessel has suf®cient or de®cient stability. (20)
2. (a) (b)
(c)
De®ne TPC. (5) Explain why the TPC for a given draft will vary with the density of the water in which the ship ¯oats. (10) Ashiphasanevenkeeldraughtof3.78mandisrequiredtochange berth to one where the maximum draught allowed is 3.60 m. Calculate the amount of cargo that must be discharged before the ship can shift berth. (5) TPC=5.5
* The worksheet provided with this paper is the same as that shown in Figure 44.1 on page 375 of this book (where simpli®ed stability data relating to worked examples are plotted).
kg 0.60 m kg 2.50 m kg 3.60 m
kg 4.80 m kg 7.00 m