0027/nd guidelines for Marine Lifting and Lowering Operations

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
 
FOR
 
MARINE
 
LIFTING
 
&
 
LOWERING
 
OPERATIONS 
0027/ND Rev 11 
 
Page 13 of 84 
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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