Glossary

Marine warranty survey (MWS)

A marine warranty survey is the independent review and approval of a marine operation — a load-out, transport, lift, installation or tow — on behalf of the insurer. The marine warranty surveyor checks the engineering, procedures and equipment against a standard such as DNV-ST-N001 and issues a certificate of approval before the operation proceeds.

What the engineer must submit

The MWS reviews the transportation motion analysis, sea-fastening and grillage calculations, lift analyses and rigging, ballast and load-out sequences, stability at each stage, method statements and the certificates for equipment. The designer answers the surveyor’s comments until a certificate of approval is issued.

Independence

The MWS must be independent of the design and installation contractors. Kannamwar Engineering prepares the packages the MWS reviews; it does not act as MWS on operations it has engineered.

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Services we deliver here

Sea Fastening & Load-out EngineeringSea-fastening and load-out engineering for cargo, modules and cranes carried on barges and heavy-transport vessels: motion and acceleration criteria, grillage and tie-down design, ballast and load-out sequences, and the calculation package prepared for marine warranty surveyor approval. Delivered from Mumbai to EPC, T&I and fabrication contractors in India, the Gulf, West Africa and Southeast Asia.Lifting & Heavy-Lift EngineeringLift engineering for offshore and yard lifts: rigging design, lift-point and padeye checks, dynamic amplification, crane-vessel and barge stability during the lift, and the lift plan calculations reviewed by class or a marine warranty surveyor. Our team has engineered 100+ heavy lifts, including riser and conductor installation campaigns on ONGC platforms.

Frequently asked questions

Who appoints the marine warranty surveyor?

The underwriter of the project’s marine cargo or construction-all-risks insurance, usually through the contractor or owner who holds the policy.