General Arrangement Plan

General Arrangement Plan

Lesson 2General Arrangement PlanGeneral Arrangement Plandepicts the division and arrangement of the ship

side view

plan views of the most important deckscross-sectionsClassical freighter / cargo liner - general arrangement plan

The views and sections display:

division into compartments (tanks, engine room, holds)location of bulkheadslocation and arrangement of superstructure parts of the equipment (winches, loading gear, bow thruster, life boats)Basic data included in the GAP:

dimensions volumes of the holdstonnagedeadweight

engine power

speed classClass registar, length of voyage, type of voyage, dangerous cargo.6

a. upper deck or main deckb. forecastlec. tweendeckd. tanktope. upper hold and lower holdf. peak tankg. chain lockerh. bosuns lockeri. collision bulkheadsj. engine roomk. steering machineryl. double bottomm. cofferdamsn. superstructurea. Upper deck or main deckThe principal deck of a vessel; in some ships the highest deck of the hull, usually but not always the weather deck; in sailing warships often a deck under the upper deck.

b. Forecastleforemost part of the upper deckusually raised above the main deck

c. Tweendeckspace between decks intermediate deckdivides the vessel into separate holds

d. Tanktopinside bottom of the vesselthe plating forming the inner bottom of a ship hull

e. Upper hold / Lower holdspaces that contain the cargoes

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

g. Chain lockerstorage for anchor chain

h. Bosuns locker= Boatswains lockerserves as storage for ropes, paint and dunnage

i. Collision bulkheads foremost major watertight bulkhead prevent the vessel from flooding in case of collision with another vesselfireproof

j. Engine room= machinery spacewatertight compartmentsituated over the after peaktankhouses the main and auxiliary machinery

j. Engine roomon a large percentage of vessels engine room is located near the bottom, and at the aftusually 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 linesk. Steering machinerygives the power for moving the rudder

l. Double bottomprovides strength and storage space for fuel, lubricating oil, fresh water, salt (ballast) water and potable water

m. Cofferdamsempty spaces / longitudinal and transverse separations between tanks prevent leaking of liquids from one double bottom tank into another

n. Superstructureaccommodation for the crew and passengersmessroom, galley, pantry

Shipboard terminology for position in a ship COLLOQUIAL TERM M.E. TERMfore endforwardafter endaftmidships partamidshipsright sidestarboard s.left sideport s.in front ofbefore / forward ofbehindabaft / aft ofacross (the ship)athwartshipsfrom stem to sternfore and aft

PositionUnits of measurementDescribing shapes