The Aqualis Offshore teams of Marine Warranty Surveyors, Engineers and Master Mariners act to protect Underwriters’ interests or self-insured Clients.

We provide independent third-party review and approval of offshore projects. The teams have extensive experience in a wide range of offshore activities from simple marine operations to complex and challenging offshore projects.

Typical activities may include:

  • Document reviews
  • Suitability marine warranty surveys of offshore marine spreads
  • Approval of towages, heavy lifts and installations
  • Subsea operations
  • Decommissioning and removal of offshore structures
  • Acting as Marine Advisors to oil companies and their contractors

Underwriter Approvals

Aqualis Offshore is well known in the insurance market by many of the key international energy underwriters. We have been approved as Marine Warranty Surveyors on projects which include offshore construction works, transportations (including floatovers and heavy lift topside load-outs), jack-up rig moving and location approvals, towages and dry transportations.

Marine Warranty Surveyor Role

The MWS marine warranty surveyor role is to make reasonable endeavours to ensure that the risks associated with the warranted operations are reduced to an acceptable level in accordance with best industry practice. Marine Warranty Services may include approvals for the following operations:

  • Ocean towages
  • Barge transportations
  • Unusual / oversized cargoes on ships
  • Location Approval for MODUs
  • Offshore rig move attendance onboard MODUs
  • Loadout, transportation and installation of offshore platforms, topsides and sub-sea structures
  • Floating construction activities, floatover, deck mating, FPSO mooring installation & TLP hook-up
  • Pipelay operations
  • Bridge and harbor construction activities

Loadout Approvals

The procedures, supporting engineering calculations and analyses of the operation are reviewed. Typically this will include equipment, proposed methods, limiting operational conditions, structural capacity, floating stability of vessels, quay strength, crane rigging capacity and proposed contingency measures. This work is performed by naval architects, structural engineers, marine surveyors and master mariners with many years’ experience in developing, reviewing and carrying out these operations.

Transport Approvals

Transport approvals address the seafastening arrangements, cargo’s structural integrity, vessel’s stability and strength, proposed route, limiting design conditions, and the safe transportation of cargo, typically from the fabrication to installation site. Cargo may include jackets, decks, jack-ups, semi-subs, process equipment and other such heavy structures and project equipment. Once the office review has been completed, the MWS attends to check that all arrangements are as planned and once everything is ready, the transport operation may depart. At this stage, a Certificate of Approval is issued and the progress of the voyage is monitored to the final destination.

Marine warranty services


Installation Approvals

The final stage following loadout and transportation is the installation phase. Detailed reviews will be performed for all aspects of the installation operation, providing advice (where appropriate) and approval of the documentation, equipment and item to be installed.

The surveyor will confirm the operation is conducted as planned and in accordance with the agreed procedures, then issue a certificate of approval. Our Surveyors have a high level of experience in these operations and will help to ensure everything proceeds smoothly.

Rig Move Approvals

Rig move data for the rig and location will be reviewed and an assessment made of the suitability of the rig at the proposed location. A location approval will then be issued. Suitability surveys of the rig and towing vessels will be carried out. A towage certificate of approval is issued for the rig move once preparations have been completed and the rig is ready to start the tow. 

The MWS attends onboard during the rig move and will monitor jacking transit, pre-load or anchoring from departure until the rig is safely installed at the new location. Aqualis Offshore’s rig movers, master mariners and engineers have the expertise to ensure operations are conducted safely.

Marine warranty survey


Suitability Marine Warranty Surveys

Suitability surveys of the transportation and installation vessels are carried out. The surveyor will be familiar with vessel type and the work to be performed. The MWS confirms that the vessel is fit for the intended purpose and may make recommendations to the Client if necessary.

Witnessing Trials and Tests

At many stages of a project equipment must be tested and shown to be functioning as required. Aqualis Offshore surveyors are regularly called upon to provide independent verification by witnessing these trials and tests. Examples include bollard pull tests, crane load tests and jacking trials.

Marine Advisors

Our surveyors have a wealth of experience in many aspects of offshore marine operations and can offer 3rd party independent advice on similar operations and methodology to produce the best results while keeping risk to acceptable levels. This experience is invaluable when unusual operations or alternative solutions are required.

Standards and Procedures

Aqualis Offshore normally applies the standards set forth by ISO 19901-6: Marine Operations. These internationally recognised standards apply to the design, construction and operation of offshore structures of all types used in the petroleum and natural gas industries. We also work to agreed alternative project specific standards where appropriate.

Quick Enquiry