Definitions Flashcards
1
Q
Freeboard (FBD)
A
- Distance from top edge of deck line brackets (free board deck) measured at a midships to waterline
2
Q
Water tight
A
A hatch, doorway or other means of closure which stops ingression of water on each side
3
Q
LBP
A
Length between perpendiculars
4
Q
FP
A
- Forward perpendicular, vertical line from where the summer load line meets the stem
5
Q
LWL
A
- Length on load waterline
- Distance along
Length of hull at waterline when fully loaded (when floating)
6
Q
AP
A
- After perpendicular
- Aft side of rudder post where meets some load line
7
Q
Weather tight
A
-Door, hatch or any other means of closure that will start water in worse sea and weather conditions while in service
8
Q
Net tonnage
A
- deductions from gross tonnage
- Gross tonnage minus non-revenue spaces
- I.e.- crew accommodation, machinery spaces, Galley, store rooms
9
Q
Amidships
A
- Midway point between FWD and AFT perpendiculars
10
Q
LOA
A
- Length overall
11
Q
Gross tonnage
A
Internal volume of the ship
12
Q
Sheer
A
- Forward and aft couverture of the deck viewed from side on
13
Q
Beam
A
- Maximum width of vessel
14
Q
Flare
A
- outward curvature of the vessels bow
15
Q
Camber
A
- Transverse downwards curvature of the Weather deck
16
Q
Depth
A
- distance from the bottom of the keel to the free board deck
17
Q
Centre of gravity
A
- Sometimes referred to as COG
- Is the centre of downward acting force
18
Q
Centre of buoyancy
A
- Sometimes referred to as COB
- Is the centre of all upward acting forces
- Or the centre of the immersed portion of the vessel
19
Q
Displacement
A
- is the weight of the water displaced in order for the vessel to float
- Measured in metric tons of 1000 KG
20
Q
Metacentre
A
-The point around which a vessel inclines
