Ship

1
Ships measurement

• Lesson 3

2
0. Basic vocabulary 1
3
0. Basic voacbulary 1 - answers

• 1. length
• 2. height
• 3. width
• 4. depth
• 5. diameter
• 6. thickness
• 7. area
• 8. volume

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0. Basic vocabulary 2
5
0. Basic vocabulary 2 answers

• length long
• width wide
• height high
• depth deep
• thickness - thick

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0. Baisc vocabulary 3
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1. General Units of measurement

• In engineering 3 types of METRIC UNITS
  are used
•  
• 1. BASIC METRIC UNITS refer to LINEAR
  DIMENSIONS, i.e. those which can be measured
  in a straight line and are
• a) LENGHT
• b) HEIGHT
• c) WIDTH or BREADTH
• d) THICKNESS
• e) DEPTH
  
•  
• Other basic units as KILOGRAMME, SECOND,
  RADIAN are used to describe physical
  quantities as MASS, TIME, ANGLE

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1. General Units of measurement

• 2. DERIVED METRIC UNITS
•  
• DERIVED METRIC UNITS are the products of
  the BASIC units and are
• AREA
• VOLUME
• CAPACITY
•  
• AREA is obtained by multiplying the basic
  units of LENGHT and BREADTH (WIDTH) and is
  measured in SQUARE METRES
•  
•  

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1. General Units of measurement

• VOLUME and CAPACITY are measured in CUBED
  LINEAR UNITS as CUBIC METRES
•  
• The volume capacity of liquids can be
  measured in LITRES.
•  
• VOLUME is the space occupied by an object
  or substance
• CAPACITY is the ability of a container
  or tank to hold something.
•  

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1. General Units of measurement

• 3. COMPOUND METRIC UNITS
•  
• COMPOUND UNITS are made up of BASIC and
  DERIVED UNITS OF MEASUREMENT such as
• STRESS
• POWER
• ENERGY
• ACCELERATION
• WORK
•  

11
1.1 Basic metric units- exercises

• The bar is three metres ( GB ) / meters ( US
  ) long.
• The bar is three meters in lenght.
• The bar has a lenght of three meters.
• The lenght of the bar is three meters.
• The driving belt is sixty millimeters broad
  / wide.
• The driving belt is sixty millimeters in
  breadth / width.
• The driving belt has a breadth / width of
  sixty millimeters.
• The breadth / width of the driving belt is
  sixty millimeters.
• The support tower is one / a hundred
  meters high.
• The support tower is one hundred meters in
  height.
• The support tower has a height of one
  hundred meters.
• The height of the support tower is one
  hundred meters.

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1.1 Basic metric units- exercises

• The sheet is three millimeters thick.
• The sheet has a thickness of three
  millimeters.
• The thickness of the sheet is three
  millimeters.
• The trench is two meters deep.
• The trench is two meters in depth.
• The trench has a depth of two meters.
• The depth of the trench is two meters.
• The block has a mass of 50 kilogrammes (
  GB ) / kilograms ( US ).
• The block is of 50 kg. mass.
• The mass of the block is fifty
  kilogrammes.

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1.2 Derived metric units - exercises

• The plate has an area of six square
  meters.
• The plate is six square meters in area.
• The area of the plate is six square
  meters.
• The brick has a volume of one thousand
  six hundred cubic centimeters.
• The brick is one thousand six hundred
  cubic centimeters in volume.
• The volume of the brick is one thousand
  six hundred cubic centimeters.
• The tank has a capacity of twenty - four
  cubic meters.
• The tank is twenty - four cubic meters in
  capacity.
• The capacity of the tank is twenty - four
  cubic meters.

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2. Shapes
15
2. Shapes - exercise

• It is shaped like a circle. Its circular in
  shape.
• It is shaped like a cylinder. ...
• It is shaped like a sphere. ...

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3. Tonnage

• a measure of the size or cargo carrying
  capacity of a ship the amount of cargo the
  vessel is capable of carrying
• Gross Register Tonnage
• Net Tonnage
• Deadweight Tonnage

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3.1 Gross Register Tonnage

• the entire volume of the enclosed spaces of the
  vessel that can be used for cargo, stores and
  accommodation

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3.2 Net tonnage

• volume that can be used to carry cargo
• it is calculated by deducing the spaces that are
  not used for cargo from the gross tonnage
• often used to calculate harbour dues

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3.3 Deadweight tonnage

• the weight of all the contents a vessel is
  capable of carrying when loaded to summer mark

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4. Cargo spaces

• Bale space
• Grain space
• Oil space
• Ullage

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4.1 Bale space

• the volume of the cargo holds that can be used to
  carry general cargo

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4.2 Grain space

• the volume of the cargo holds that can be used to
  carry dry bulk cargo

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4.3 Oil space

• 98 of the total volume of wet bulk tanks

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4.4 Ullage

• empty space on top of the liquid level that will
  prevent a tank from overflowing when oil expands
  due to heat

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5. Displacement

• the amount of water that the ship displaces while
  floating
• the weight of the displaced fluid is directly
  proportional to the volume of the displaced fluid
  (if the surrounding fluid is of uniform density).

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5. Displacement

• Archimedes principls (Archimedes principle)
  states that the buoyant force on an object is
  going to be equal to the weight of the fluid
  displaced by the object, or the density of the
  fluid multiplied by the submerged volume times
  the gravitational constant, e.g. among completely
  submerged objects with equal masses, objects with
  greater volume have greater buoyancy.

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6. Dimensions

• Length Over All (L.O.A.)
• Length between Perpendiculars
• Breadth / Width
• Moulded breadth
• Moulded depth
• Beam

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6. Dimensions
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6. Dimensions
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6.1 Length Over All (L.O.A.)

• the length from the extreme point of
• stern to the extreme point of stem (bow)

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6.2 Breadth / Width

• the breadth (width) measured to the outside
  surface of plating

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6.3 Moulded breadth

• the horizontal distance between the insides of
  the moulds
• breadth at the widest point measured to the
  outside surface of the frames

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6.4 Moulded depth

• vertical distance between the insides of the
  moulds (including the double bottom)
• the vertical distance amidships from the top of
  keel to the top of deck beam at the underside of
  the deck plating at ship's side

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6.5 Beam

• the extreme breadth of the vessel
• important for obtaining clearance to proceed in
  restricted, narrow fairways

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6.6 Length Between Perpendiculars

• is measured between the fore perpendicular and
  aft-perpendicular

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6.7 Construction waterline

• line to which the ship may be loaded in summer

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6.8 Draught (draft)

• the vertical distance from the surface of
  the water (waterline) to the vessel's bottom
• loaded draft, light draft, salt-water draft,
  fresh-water draft

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6.9 Freeboard

• the vertical distance from the water to
  the weather deck edge at any point in the
  lenght of the ship 
• distance between the deckline and waterline

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6.10 Height or Air draught

• distance from the waterline to the highest point
  of the vessel
• vertical clearance

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6.11 Underkeel Clearance

• the distance between keel and seabed