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Ship measurement
1. Dia 1
mu2. “A ship displaces a weight of water that is equal to its own weight.”
sound3. Dia 3
Therefore …...a vessel will experience
an upthrust that is equal
to the weight of the
displaced water.
Displacement
4. Dia 4
When Buoyancy (B)is equal to Gravity (G)
the vessel will float.
sound
5. Dia 5
The weight of a vessel and her contents,or
the weight of the displaced watermass.
sound
6. Dia 6
• Gross tonnage equals the entire volume ofthe enclosed spaces of the ship.
sound
7. Dia 7
• Net tonnage can be calculated by deductingthe spaces that are not used for cargo from
the gross tonnage.
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8. Dia 8
• Harbour dues are usually calculated accordingto the gross tonnage, but some ports use the
vessel’s net tonnage.
sound
9. Dia 9
• By deadweight is understood the weight ofthe vessel’s contents:
cargo bunkers - ( fuel / lubricating oil /
ballast water / fresh water/
potable water)
equipment stores.
sound
10. Dia 10
sounBy bale space is meant the volume of the
cargo holds that can be used for general cargo.
11. Dia 11
By grain space is meantthe volume of thecargo holds that can be used for bulk cargo.
S
12. Dia 12
Ullage – the free space above the liquid in atank, which is measured in metres or feet.
By Oil Space is understood 98% of the total
volume of the wet bulk tanks.
13. “Length over all” (L.O.A.) is the total length of the vessel.
sound14. Length Between Perpendiculars (LPP) is measured between the fore perpendicular (fpp) and the aft perpendicular (app).
sound15. Dia 15
The Construction Waterline (CWL) or Summer Loadlineis the line to which the ship may be loaded in summer.
sound
16. Dia 16
The fore perpendicular is the vertical line throughthe intersection of the CWL and the stem.
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17. Dia 17
The aft perpendicular goes throughthe rudderstock.
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18. Dia 18
sound19. Dia 19
Horizontal distancebetween the insides of
the moulds (A-B).
A
B
20. Dia 20
Vertical distancebetween the insides of
the moulds (A-B).
A
A
B
B
21. Dia 21
By beam is meant theextreme breadth of the
vessel (A-B).
A
B
22. Dia 22
Distance from the bottomof the keel to the surface
of the water (WL - K).
WL
A
B
K
23. Dia 23
HWL
A
B
Distance from the waterline
to the highest point of
the vessel (WL - H).
24. Dia 24
Distance between decklineand waterline (DL - WL).
DL
A
B
WL
25. Dia 25
Distance between keeland sea-bed (K - B).
K
sound
B
26. Dia 26
TheInternational Maritime Language Programme – IMLP
C
The IMLP is an IMO-standard.
P.C. van Kluijven