Download - General Arrangement Plan
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Lesson 2
General Arrangement Plan
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General Arrangement Plandepicts the division and arrangement of the ship
side view
plan views of the most important decks
cross-sections
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The views and sections display:
division into compartments (tanks, engine room, holds)
location of bulkheads
location and arrangement of superstructure
parts of the equipment (winches, loading gear, bow thruster, life boats)
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Basic data included in the GAP:
dimensions
volumes of the holds
tonnage
deadweight
engine power
speed
class
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Spaces and separations
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Spaces and separations
a. upper deck or main deck (sep.)b. forecastle (sep.)c. tweendeck (sep.)d. tanktop (sep.)e. upper hold and lower hold (sp.)f. peak tank (afterpeak/forepeak) (sp./sep.)g. chain locker (sp.)h. bosun’s locker (sp.)i. peak-bulkheads (sep.)j. engine room (sp.)k. steering gear room (sp)l. double bottom (sp.)m. Cofferdams (sp./sep.)n. Superstructure (sp.)
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a. Upper deck or main deckthe principal deck of a vesselshelter for contents
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b. Forecastleforemost part of the upper deckusually raised above the main decklocation of winches
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c. Tweendeckspace between decks – intermediate deckdivides the vessel into separate holds
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d. Tanktopinside bottom of the vesselthe plating forming the inner bottom of a
ship hull
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e. Upper hold / Lower holdspaces that contain the cargoes – storage
space
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f. Peak tankforemost and aftermost spaces of the
vesselserve as storage spaces for ballast watercapable of absorbing part of the impact
forces that are released in case of a collision –safety zone
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g. Chain lockerstorage space for anchor chain
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h. Bosun’s locker= Boatswain’s lockerserves as storage for ropes, paint and
dunnage
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i. Peak bulkheads watertight collision separationsprevent the vessel from flooding in case of
collision with another vesselfireproof
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j. Engine room= machinery spacewatertight compartmenthouses the main and auxiliary machinery
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j. Engine roomon a large percentage of vessels engine
room is located near the bottom, and at the aft
usually comprises few compartments - this design maximizes the cargo carrying capacity of the vessel and situates the prime mover close to the propeller, minimizing equipment cost and problems posed from long shaft lines
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k. Steering gear roomlocation of steering geargives the power for moving the rudder
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l. Double bottomprovides strength and storage space for
fuel, lubricating oil, fresh water, salt (ballast) water and potable water
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m. Cofferdamsseparations – to prevent leakinglocation of pumps
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n. Superstructureaccommodation for the crew and
passengers; messroom, galley, pantrywheelhouse
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Shipboard terminology for position in a ship COLLOQUIAL TERM M.E. TERMfore end forwardafter end aftmidships part amidshipsright side starboard s.left side port s.in front of before / forward ofbehind abaft / aft ofacross (the ship) athwartshipsfrom stem to stern fore and aft