0027/nd guidelines for Marine Lifting and Lowering Operations

 
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4 
THE APPROVAL PROCESS 
4.1 
GL NOBLE DENTON APPROVAL 
4.1.1 
Further information on the approval process appears in DNVGL-SE-0080 Noble Denton marine 
services – Marine Warranty Survey, Ref. [21]. 
4.1.2 
Approval may be given for such operations as: 

Installation of liftable jackets 

Hook-assisted installation of launched jackets 

Installation of templates and other sub-sea equipment 

Handling of piles 

Installation of decks, topsides modules, bridges and flare towers/booms 

Load-outs and Load-ins 

Transfer of items between a transport barge and the deck of a crane vessel 

Installation of wind farm components 
4.1.3 
Lifts may be by a variety of crane configurations, including single cranes, two cranes on a single 
vessel, two or more cranes on separate vessels, single crane multi-hook sheerleg vessels, cranes 
mounted on jack-up vessels, or by one or more land based cranes. 
4.1.4 
GL Noble Denton approval may be given for the operation, including reviews of marine and 
engineering calculations and procedures, and consideration of: 

The actual and forecast weather conditions 

The suitability and readiness of all equipment 

The behaviour of the lifting vessel 

Any site changes in procedures 

The general conduct of the preparations for the operation. 
4.1.5 
A Certificate of Approval for a lift covers the marine operations involved in the lift only and is issued at 
the Point of No Return, at the start of the lifting operation. An offshore lift is normally deemed to start 
when cutting of seafastenings starts, after the crane is connected and slings partly tensioned. In 
exceptional cases procedures may be accepted in which a pre-agreed number of seafastenings are to 
be removed before the Point of No Return, as described in Section 7.3.5 of 0030/ND, Ref. [5].  It is 
normally deemed to be completed when the lifted object is set down in its intended position, and the 
crane(s) has been disconnected. For completion of lifted load-outs see Section 4.3 of 0013/ND, Ref. 
[2].