0027-nd rev 11.2 8-jul-16 guidelines for marine lifting and lowering operations
Page 18 of 84 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].