Flotation (Ship stability and construction) Flashcards

1
Q

Draught

A

Distance between the waterline and the keel of the vessel

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Freeboard

A

Distance between the waterline and the Freeboard deck

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Freeboard deck

A

The uppermost complete deck exposed to the weather, which has permanent means of closing all openings open to the wether and below which all openings in the side of the ship are fitted with permanent means of watertight closing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Why are draught and freeboard inversely proportional?

A
  • Draught increases=freeboard decreases
  • Draught decreases=freeboard increases
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What are the four international conventions on load lines?

A
  • To determine the minimum safe freeboard for a vessel based on damage stability calculations ad subdivisions
  • To ensure that cargo ships would not be overloaded and sail in an unsafe and unseaworthy condition
  • To standardise loading limits
  • Water density and seasonal conditions considered for each load line zones
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Draw the load line marks

A

(Gooogle image)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

WNA (load line)

A

Winter North Atlantic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

W (load line)

A

Winter

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

S (load line)

A

Summer

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

T (load line)

A

Tropical

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

F (load line)

A

Fresh

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

TF (load line)

A

Tropical Fresh

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the width of load lines?

A

25mm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is the distance between TF&F,T&S and S&W?

A

1/48th summer draught

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is the distance between W and WNA?

A

50mm.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What does TPC stand for?

A

Tonnes per centimeter

17
Q

TPC definition

A

The mass required to be added or removed to cause sinkage or rise

18
Q

What is the density of sea water?

A

1.025 t/m^3

19
Q

What is the density of fresh water?

A

1.000 t/m^3

20
Q

What is the density of dock water?

A

Between 1.000 and 1.025 t/m^3

21
Q

State Archimedes principle

A

any object immersed in a fluid is acted upon by an upward, or buoyant, force equal to the weight of the fluid displaced by the object.