Seaworthiness of Ships. Test 6 – Online Maritime Tests

With a forward draught of 8.00m and an aft draught of 9.00m, the amidships draught reads 8.30m. What state is the vessel in?

What is 'relative or specific gravity?'

What is the 'Centre of Flotation or Tipping Centre' of a vessel?

It is the geometrical centre of the waterplane and also the point about which the vessel trims.
It is a fixed known point on the longitudinal metacentre.
It is the point on which the vessel initially rests, when being drydocked.
It is the exact mid point of the ship, around which the vessel trims as weights are added or taken away.

What is the equilibrium state of the vessel in this diagram?

What is 'reserve buoyancy' in relation to a vessel?

What causes 'Sagging' in a loaded vessel?

What causes ships to experience 'Stresses?'

Stresses to a ship are mainly caused when it is subjected to forces from wind, waves and loads.
As long as a ship is properly built and handled , it will never experience stresses .
When the upward force due to weight at a point, and the downward thrust due to buoyancy, at the same point are unequal.
When the downward force due to weight at a point, and the upward thrust due to buoyancy, at the same point, are not equal.

Review Answers