0027/nd guidelines for Marine Lifting and Lowering Operations

10.4 
HEAVE COMPENSATION 
10.4.1 
Where heave compensated or constant tension lifts are planned, then the following information shall 
be obtained for the crane or cranes: 

Crane technical description and operating procedures, 

Safe working load radius curves and boom slew angles in heave compensated mode or 
constant tension mode plus limiting seastates, 

Crane de-rating curves, 

FMEA for the crane system, 

DAF analysis in heave compensated or constant tension modes, 

Engine room/deck mechanics maintenance logs. 
10.4.2 
Additionally maximum and minimum crane loads for active heave or constant tension compensation 
should also be provided. Installation analyses should incorporate effects of heave compensation and 
demonstrate improved operability due to its activation. 
10.4.3 
Further details for the design and requirements for active heave or constant tension compensation are 
given in DNV-OS-H206, Ref. [18], DNV-RP-H103, Ref. [19], and DNV-RP-H201, Ref. [20].  
11 
11 

---

GUIDELINES
 
FOR
 
MARINE
 
LIFTING
 
&
 
LOWERING
 
OPERATIONS 
0027/ND Rev 11 
 
Page 39 of 84 
10.5 
INSTALLATION VESSEL
10.5.1 
Installation vessels shall be capable of performing their intended functions within the seastates 
predicted for the job. The vessel deck layout shall be adequate for the equipment and provide 
sufficient clear personnel access ways.
10.5.2 
In some cases it is likely that the structure will be loaded at an inshore location. In this case there must 
be adequate clearances around the structure when considering lifting operations, vessel movements 
and structure movements. 
10.5.3 
Some or all of the documentation and certificates in Section 6.6 of 0001/ND, Ref. [1] will be required, 
depending on the location of the operations and local regulations.