Lesson 2

General Arrangement Plan

General Arrangement Plandepicts the division and arrangement of the ship

side viewplan views of the most important deckscross-sections

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)

Basic data included in the GAP: dimensions volumes of the holdstonnagedeadweight

engine power

speed class

a. upper deck or main deckb. forecastlec. tweendeckd. tanktope. upper hold and lower holdf. peak tankg. chain lockerh. bosun’s lockeri. collision bulkheadsj. engine roomk. steering machineryl. double bottomm. cofferdamsn. superstructure

a. 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. Bosun’s locker= Boatswain’s 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 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

k. 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 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