Page 439 - statbility for masters and mates

OPERATIONAL SAFETY
Attempt ALL questions
Marks for each question are shown in brackets
1. (a)
A vessel on even keel is at anchor outside a port in SW of RD 1.025 at a Summer Load draught of 10.24 m.
TPC 18 (constant); Summer Load displacement 13 176 t. Calculate the quantity of cargo to discharge into barges in order that the vessel can pass over a bar at the river entrance (RD 1.025) with an under keel clearance of 1.5 m. Depth of water available at the bar 9.25 m. (10)
(b) Calculate the FWA of the vessel mentioned in Q.1(a). (7) (c) Explain why, when loading a vessel, it is necessary to know the Dock Water density. (8)
2. A vessel is initially displacing 6650 t.
KG 8.40 m; KM 8.90 m (constant).
A 38 t weight is to be discharged from a position on the centreline Kg 5.2 m using the vessel's own derrick. The derrick head is 32 m above the keel.
Calculate the vessel's GM value when:
(a) (b)
3. (a)
(b) (c)
4. (a)
(b) (c)
5. (a)
(b) (c)
(d)
the weight is lifted just clear of the initial stowage position; (15) the weight is ®nally discharged ashore. (10)
Explain the formation of EACH of the following:
(i) ship's sweat; (6)
(ii) cargo sweat. (6) List FIVE reasons for ventilating the holds of a general cargo vessel. (5) (i) List SIX hygroscopic cargoes. (6) (ii) List TWO non-hygroscopic cargoes. (2)
State the meaning of EACH of the following abbreviations:
(i) FLT; (1) (ii) ISO. (2) List the methods by which cargo can be secured onto pallets. (5) State the advantages and disadvantages of unitising cargo. (17)
With respect to the carriage of bulk or packaged Dangerous Goods, state the meaning of EACH of the following abbreviations:
(i) EmS No; (1) (ii) MFAG No; (1) (iii) UN No. (2) List the main headings found under an EmS entry. (10) Detail the symptoms resulting from exposure to increasing con- centrations of Benzene. (3) List the principal sources of information when carrying any type of dangerous cargo. (8)
Specimen examination papers 427