Marine Online
This section will provide a short introduction to
some of the most common sling operations
take your precautions regarding personnel transfer by basket
risk assessment of lifting operations
hand signals used during lifting operations
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there are many different aspects of a lifting operation that must be
considered before start the operation
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one of the most important is how to sling the load what type of gear to use
and how to attach the gear
in this section we will have a look at a few of the most common slinging
operations
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this is a very common test on board a ship or offshore installation lifting of
several pipes rods etc in one lift can be dangerous if it is not done in a safe
manner
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on typical and very dangerous mistake he's left cube Euler's of different
diameters or even cube Euler's together with for example steel bars in one lift
in such cases there is a great risk that the small items may slip out
try to follow these basic guidelines when lifting tubulars at your workplace
always
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position the slings approximately sent from each end of the items to be
lifted if possible
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wrap the sling double around the tubulars in a choke it and tighten choke
land the lift and release the slings carefully as individual tubes may roll
never
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sling tubes a different diameter or tubes together with steel bar or other
items in the same lift
tighten the choke by hammering
warning
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choking of slings reduces the strength of the sling thus each sling should have
an swl equal to the total weight of the lift or more even if a two-legged sling
is used
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when singing cable reels care must be taken not to damage the cable use of
soft fiber slings is preferable but if wire things have to be used wire cable
should be protected by timber packing or similar
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electrical cables should be slung through the real opening in all cases
some of these cables are very sensitive and the slightest deformation may make
them unusable
the preferred method of slinging drums is to use two fiber slings but cargo net
or drum slings may also be used
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extreme caution must be exercised when using drum slings as they tend to slip
off immediately when the load upon the slings is released these slings must
only be used for internal transfer on board or on the rig
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even though there are relatively few docume
accidents from basket transfer of personnel it is considered a high-risk
operation due to the potentially fatal consequences an accident may have
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thus such operations must be carried out with the utmost care and be well
prepared
the following safety precautions are a recommended minimum
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the transfer must be approved by the master oh I am of the ship or
installation
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there must be good visibility adequate illumination and weather conditions
permitting a safe transfer
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the crane operator must have ample experience and be confident in his
ability to carry out the transfer in a safe manner
prior to the transfer person responsible for the transfer should examine the
basket
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before starting the liftoff from the landing areas must be cleared in an
adequate area for the basket to be lifted and landed safely
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there must be direct radio contact between the responsible person on deck
the crane operator and the master of the supply vessel
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during the transfer a rescue boat or standby boat should be ready for
immediate action in case of a Man Overboard situation arising
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if none of the passengers being transferred has been transferred by
basket previously then a person who is well familiar with such transfer should
accompany them
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during transfer the passengers shall stand on the ring outside the ropes and
have both hands-free to grip the ropes
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the passengers must wear life jackets or life-saving suits during the transfer
small amounts of luggage can be from the basket if placed in the middle
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but it is preferable to transfer the luggage
but transfer without passengers
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lifting and lowering of the basket shall take place over open water
and the vessel shall be prepared to stop the propellers during the transfer
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personnel transfer with baskets shall be recorded together with prevailing
weather conditions in the appropriate LOC or record
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your ship or installation is likely to have its own procedures for personnel
transfer by basket
in such cases these procedures will course take precedence and must be
followed
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in order to minimize risk and improve efficiency during a lifting operation a
risk assessment of the operation should be done before start the following
checklists can be used as a tool in order to carry out such an assessment
they are divided into three separate checklists as follows
routine lips
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simple lists
complicated lifts
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here is an example of a routine list checklist
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here is an example of simple lifts checklist
here is an example of complicated lists checklist
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