particular help required. See also Section 15.1.2 for a more detailed
description.
Consequence Factor
c
A factor to ensure that main structural members, lift points, lifting beams
and spreader bars /frames have an increased factor of safety (including
lateral loads) related to the consequence of their failure. A consequence
factor is also used in the design of slings and grommets used for lifting
operations.
Crane vessel
The vessel, ship or barge on which lifting equipment is mounted. For the
purposes of this report it is considered to include: crane barge, crane ship,
derrick barge, floating shear-leg, heavy lift vessel, semi-submersible crane
vessel (SSCV) and jack-up crane vessel.
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GUIDELINES
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Term or Acronym
Definition
DAF /
Dynamic
Amplification Factor
The factor by which the gross weight is multiplied, to account for
accelerations and impacts during the lifting operation
Dynamic hook load
Static hook load multiplied by the DAF.
Determinate lift
A lift where the slinging arrangement is such that the sling loads are
statically determinate, and are not significantly affected by minor
differences in sling length or elasticity
DP
Dynamic Positioning or Dynamically Positioned
FAT
Factory Acceptance Test
FMEA or
FMECA
Failure Modes and Effects Analysis or
Failure Modes, Effects and Criticality Analysis
FoS
Factor of Safety
F
SD
Sling or grommet design load
FSE
Free Surface Effect
Gamma b,
b
See Bending Factor
Gamma c,
c
See Consequence Factor
Gamma f,
f
See Load Factor
Gamma m,
m
See Material Factor
Gamma r,
r
See Reduction Factor
Gamma s,
s
See Termination Factor
Gamma sf,
sf
The factor representing the combined factors of Load Factor, Consequence
Factor, Reduction Factor, Wear Factor, Material Factor and Twist Factor
Gamma tw,
tw
See Twist Factor
Gamma w,
w
See Wear Factor
GL Noble Denton
The legal entity trading under the DNV GL or GL Noble Denton name
which is contracted to carry out the scope of work and issues a Certificate
of Approval, or provides a marine related advisory or assurance service.
Grommet
A grommet is comprised of a single length of unit rope laid up 6 times over
a core, as shown in IMCA guidance, Ref. [7], to form an endless loop
Gross Weight
The calculated or weighed weight of the structure to be lifted including a
weight contingency factor and excluding lift rigging. See also NTE weight.
IACS
International Association of Classification Societies
Indeterminate lift
Any lift where the sling loads are not statically determinate
Insurance Warranty
A clause in the insurance policy for a particular venture, requiring the
approval of a marine operation by a specified independent survey house.
LARS
Launch And Recovery System
LAT
Lowest Astronomical Tide
LBL
Long Baseline Array
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