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Naval archi > HULL (3) > Flashcards

HULL (3) Flashcards

1
Q

it is the watertight enclosure of the ship, which protects the cargo, machinery, and accommodation spaces of the ship from the weather, flooding, and structural damage

A

HULL

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2
Q

drawn at the point where the bow intersects the waterline

used as the forward reference of the hull

A

FORWARD PERPENDICULAR

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3
Q

can be the perpendicular drawn through the aft side of the rudderpost or through the center-line of the rudder pintles

is the aft reference line for all hydrostatic calculations

A

AFT PERPENDICULAR

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4
Q

It is the length between the forward and aft perpendiculars

a very important parameter in all stability calculations, hence calculation of the _____ at various drafts becomes an important step in carrying out stability analyses

A

LENGTH BETWEEN PERPENDICULAR

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5
Q

The length between the forward-most and aft-most point of the ship’s hull

This length plays a major role in designing the docking and undocking plans of the ship

A

LENGTH OVERALL

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5
Q

The upward curve formed by the main deck with reference to the level of the deck at the midship

usually given to allow flow of green water from the forward and aft ends to the midship and allow drainage to the bilges

The ______ _____ is usually more than the aft sheer to protect the forward anchoring machinery from the waves

A

-SHEER

-FORWARD SHEER

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6
Q

The purpose of the _____ ____ is to ensure that a ship has sufficient freeboard (the height from the waterline to the main deck) and thus sufficient reserve buoyancy (volume of ship above the waterline)

is the line where its hull meets the surface of the water

also called Plimsoll mark

a marking indicating the extent to which the weight of a load may safely submerge a ship, by way of a waterline limit

positioned amidships on both sides of a vessel’s hull and indicates the draft of the ship and the legal limit to which a ship may be loaded for specific geographical areas and seasons of the year

A

LOAD LINE

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7
Q

the deepest permitted draft considering the relatively benign weather conditions in tropical waters and the fact that the vessel floats deeper in freshwater due to lower density than in saltwater

A

TROPICAL FRESH WATER

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7
Q

the deepest permitted draft in freshwater considering that the vessel floats deeper in freshwater than in saltwater

A

FRESH WATER

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8
Q

deepest permitted draft in tropical waters considering the benign weather conditions in tropical waters

A

TROPICS

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9
Q

deepest permitted draft during summer considering benign weather conditions

A

SUMMER

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10
Q

a beam that curves upwards in the middle

A

HOGGING

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10
Q

deepest permitted draft during winter considering rougher weather conditions

A

WINTER

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10
Q

deepest draft permitted considering the rough weather conditions likely to been countered during winter in the North Atlantic

A

WINTER NORTH ATLANTIC

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11
Q

a beam that curves downwards in the middle

A

SAGGING

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12
Q

is the ratio of the ship’s underwater volume to the volume of the imaginary rectangle enclosing the underwater portion of the hull

A

BLOCK COEFFICIENT

13
Q

is the ratio of the submerged area of the midship section to the enclosing rectangle

A

MIDSHIP COEFFICIENT

14
Q

the main structural member and backbone of a ship or boat, running longitudinally along the centre of the bottom of the hull from stem to stern

A

KEEL

15
Q

distance from the waterline to the freeboard deck of a fully loaded ship

it is measured amidships at the side of the hull

represents the safety margin showing to what depths a ship maybe loaded under various service conditions—e.g., the type of cargo, the waters to be navigated, and the season of the year

A

FREEBOARD

16
Q

is the compartment where the machinery for marine propulsion islocated

generally the largest physical compartment of the machinery space

usually located near the bottom, at the rear or aft end of the vessel, and comprises few compartments

A

ENGINE ROOM

17
Q

is the smokestack or chimney on a ship used to expel boiler steam and smoke or engine exhaust

A

FUNNEL

18
Q

is the main control center of a vessel, from where the captain and officers are able to man the entire operations of the vessel

generally located in a position with an unrestricted view and immediate access to the essential areas of a ship

A

NAVIGATION BRIDGE

19
Q

The forward part of the upper deck of a ship

The crew’s quarters usually in a ship’s bow

A

FORECASTLE

Naval archi (5 decks)

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