Ships I

9 important questions on Ships I

How is displacement calculated?

The total mass of a ship.

water displaced (in M3) x density of the water (t/m3)

Through what system are container positions situated on a container vessel?

The row-bay-tier system.

Explain the row-bay-tier system

bay - longitudinal counting from forward to aft. Uneven numbers are for TEU (20ft) and even numbers are for FEU (40ft).
row - the horizontal position, counting starts from the center of the ship from 00 to starboard are uneven numbers to portside are even numbers.
tier - the vertical position of a container, the position at the tank top is 02, tiers at the hold start with 82.
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How can we test the watertightness of the hold? And which is better?

Hose test and ultrasonic test

The ultrasonic test is more reliable and can be used when freezing.

What is the reason for heavy lift vessel to place the accommodation and bridge in front?

The crew have a better view of the sea in front of them and the accommodation acts as protection from bad weather.

Which factors influence aircraft?

a.The weight of the ship
b.The weight of the cargo
c.Weight of crew, stores and equipment
d.Water and fuel in tanks
e.Constant

How can we measure constant?

Through a draft survey.

Which information is showed on a general arrangement plan?

a.Views
-A side view of the ship
-Views of the most important decks
-Sometimes cross-sections or a bow and stern view
b.Views and cross-sections show
-Division into different compartments
-Location of bulkheads
-Location and arrangement of the superstructures
-Major equipment
c.Basic data
-Principal dimensions
-Volumes of the hold
-Tonnage
-Deadweight
-Engine power
-Speed
                                                -         Class

What is the purpose of the bulb?

A bulb reduces the increase in pressure near the bow making the ship more streamlined in water. This reduces the need for engine power and the use of less fuel.

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