NAVAL TERMS PART 2 MEO CLASS4 ORALS

 NAVAL TERMS PART 2

WAKE?

• Wake is the motion of water at stern of the ship is because of ship's movement.

Longitudinal center of floatation?

• It is a point about which trim will change when loading and unloading.

Net tonnage?

• It is the volume of all spaces where cargo is loaded.

Gross tonnage?

• It is the total volume of enclosed spaces in ship.

Light weight?

• Mass of the empty ship without any effect (cargo,fuel,water,crew)

Dead weight?

• Total weight of cargo fuel, water, crew except ship's weight.

Permeability?

• Percentage of empty volume  in a ship.

Buoyancy?

• Upthrust force applied by the water to the ship.

Reserve buoyancy?

• Volume of enclosed space above the water line.

Fresh water allowance?

• When a ship moves from sea water to fresh water there will be increasing draught.

Docking allowance?

• When a ship is moving sea water to docking water there will be  increasing draught.

Propeller pitch ratio?

• Its a face pitch divide by diameter.

Slip?

• The difference between the speed of the Engine and actual speed  of the ship.

Water line ?

• Water line at the fully loaded summer is summer load line.

Molded beam?

• The maximum molded breadth which measures at mid ship is called molded beam.

Base line ?

• A horizontal line which is drawn along the top of the keel plate.

Sheer strake ?

• Top strake of the side shell plating which connects the deck plating to the shide shells.

Bilge stake / turn if bilge?

• The stake at the turn of the bilge is called turn of strake.

Air draught?

• Above the water line to extreme structure ig the ship is called air draught.

Keel ?

• Center moste plating is called keel.

Stringer strake ?

• Extreme strake of the deck plating of side  is called stringer strake.
• Which connects the sheer strake.

Parallel middle body ?

• The mid ship which remains constant in shape size and area through the length of the ship is called parallel middle body.

Entrance?

• Immersed portion of the forward region of parallel middle body.

Run ?

• Immersed portion of the aft region of parallel middle body.

Garboard strake ?

• The strake next to the keel is known as garboard strake.(stbd & port)

Stealers strake ?

• No of adjusent strake fitted in bow region .

Coffin plate ?

• Plating which connects flate plate keel to stern frame is called coffin plate.(aft)

Shoe plate?

• Plating which connects the flate plate keel to stem frame is called shoe plate.(forward)

Frame spacing?

• Its a space between two transverse frames.

Strake ?

• Continuous bond of hull plate on ship  

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