8.(a) Describe, with the aid of a sketch, the method of attachment of a Bilge Keel to a vessel’s hull, explaining the reason for the longitudinal position of the bilge keel, relative to the hull.(7)
(b) State the advantages and disadvantages of fitting a bilge keel compared with other methods of stabilisation.(3)
- With reference to the motion of a vessel in the water:
(a) list the SIX degrees of freedom, describing the meaning of EACH term;(6)
(b) sketch the position of a bilge keel, describing how it reduces vessel motion.(4)
8.(a) State TWO types of Tank Anti-Roll Stabiliser systems.(2)
(b) State the advantages and disadvantages of a stabilising tank system compared to fin stabilisation.(8)
- Describe, with the aid of a sketch, the construction and operation of an Active Controlled Tank roll damping system.(10)
- Describe, with the aid of a sketch, an active tank stabilisation system.
(10)
- Explain, with the aid of a sketch, the hydrodynamic operation of an Active Fin Stabilizer.(10)