Loading, discharging and trim

Содержание

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Before the loading of the cargo commences a stowage plan must

Before the loading of the cargo
commences a stowage plan
must be

made up to ensure the
safety of the vessel, the cargo
and the crew.

s

Making up a stowage plan

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Considerations regarding safety of ship, cargo and crew . the stowage

Considerations regarding safety of ship, cargo and crew

. the stowage

factor of the cargo

. the trim of the vessel

. sweating and intermixing
(segregation of cargoes)

. order of destinations.

sound

Making up a stowage plan

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The stowage factor indicates the volume of the cargo hold occupied

The stowage factor
indicates the volume
of the cargo hold
occupied

by one ton
of cargo.

The stowage factor

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By bale space is meant the volume of the cargo holds

By bale space is meant the volume of the cargo holds

that can be used for general cargo.

Bale space

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By grain space is meant the volume of the cargo holds

By grain space is meant the volume of the cargo holds

that can be used for bulk cargo.

Grain space

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By Oil Space is understood 98% of the total volume of

By Oil Space is understood 98% of the total volume of

the tank.

Ullage – the free space above the liquid in a tank, measured in metres or feet.

Oil space

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Types of cargoes

Types of cargoes

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General Cargo

General Cargo

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General cargo is cargo coming in boxes, crates, bags and pieces.

General cargo is
cargo coming in
boxes, crates, bags
and pieces.
The stowage

plan
will indicate where
the various
cargo-items
have been stowed.

General Cargo

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Union purchase (married gear) is a method of general-cargo-handling with two

Union purchase (married gear)
is a method of
general-cargo-handling
with two derricks
and

one runner in between.

runners

Derrick

Derrick

Union Purchase

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THE HATCH A hatch gives access to a hold.

THE HATCH

A hatch gives access
to a hold.

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Bulk cargo

Bulk cargo

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Bulk cargo is unpacked cargo of one commodity. There is dry


Bulk cargo is unpacked cargo of one commodity. There is

dry bulk cargo (grain, ore)
and wet bulk cargo (oil).

Bulk carrier carrying sugar. Crude oil carriers.

Bulk cargo

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sd Wet bulk cargo is loaded and discharged by pumps. Dry

sd

Wet bulk cargo
is loaded and discharged
by pumps.

Dry bulk cargo
is loaded and

discharged
by cranes with grabs
or by pumps.
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Containerized cargo

Containerized cargo

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When things have gone wrong ….

When things have gone wrong ….

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Containers are loaded by straddle carriers (or gantry cranes) and stacked

Containers are loaded by straddle carriers (or gantry cranes) and stacked

on the ship in Bays, Rows and Tiers.

Gantry Crane

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The bays run abeam; the rows run fore to aft, and the tiers are layers.

The bays run abeam;
the rows run fore to aft,
and the tiers

are layers.
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s Trim and Draft

s

Trim and Draft

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Lines that indicate the greatest depth to which the ship may

Lines that indicate
the greatest depth
to which the ship may
be loaded

under
various circumstances
and in
different seasons.

Deckline

Plimsoll
mark

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PLIMSOLL MARK Deckline Plimsoll line The distance between deckline and Plimsoll line indicates Summer Freeboard.

PLIMSOLL MARK

Deckline

Plimsoll line

The distance between deckline and Plimsoll line
indicates Summer

Freeboard.
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LOAD LINES A load line indicates the depth to which the

LOAD LINES

A load line indicates the depth to which the ship


may be loaded in

Tropical fresh water

Fresh water

Tropical water

Summer

Winter

Winter North
Atlantic

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DRAFT Due to the salinity of sea water draft in sea

DRAFT

Due to the salinity of sea water
draft in sea water
is less

than draft
in fresh water

Sea water has a higher
specific gravity than
fresh water.

Sea-water draft

Fresh-water draft

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FULL AND DOWN By “full and down” is meant that the

FULL AND DOWN

By “full and down” is meant that
the vessel is

fully laden and is floating
on her load line.
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EVEN KEEL When a vessel is floating on even keel, there

EVEN KEEL

When a vessel is floating on even keel, there is

no difference between draft fore and draft aft (“She is well trimmed”).
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S DOWN BY THE STERN When draft aft is greater than

S

DOWN BY THE STERN

When draft aft is greater than draft fore

she is down by the stern (trimmed by the stern).
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DOWN BY THE HEAD When draft fore is greater than draft

DOWN BY THE HEAD

When draft fore is greater than draft aft

she is down by the head (trimmed by the head).

S

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LIST (HEEL) When starboard-draft is less than port-draft she has a list to port. S

LIST (HEEL)

When starboard-draft is less than port-draft she has a list

to port.

S

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S When draft amidships is greater than draft fore and aft the vessel is sagging. SAGGING

S

When draft amidships is greater than draft fore and aft the

vessel is sagging.

SAGGING

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S When draft amidships is less than draft fore and aft, the vessel is hogging. HOGGING

S

When draft amidships is less than
draft fore and aft, the vessel

is hogging.

HOGGING