Marine Warranty Surveying
Marine Warranty
Surveying
Independent technical assurance for complex marine operations. Specialists in Heavy Lifts, RORO, and Offshore Oil & Gas.
Request MWS ServicesWhat is MWS?
Marine Warranty Surveying Explained
Marine Warranty Surveying (MWS) is an independent technical assurance service required by marine insurers, project financiers, and asset owners to verify that complex marine operations are planned and executed safely, in accordance with approved engineering standards, and within warranty conditions.
MWS is not a regulatory requirement—it is an insurance requirement. Without an approved MWS certificate, insurers will not provide coverage for operations involving heavy lifts, offshore towage, RORO cargo, subsea installations, or rig moves.
For project owners, contractors, and financiers, MWS is the gateway to insurance validity and the final safeguard before high-value assets are committed to marine operations.
Our Specializations
Three Core Areas of Expertise
Heavy Lifts
End-to-end assurance for the lifting and transportation of offshore modules, process equipment, subsea structures, drilling rig components, and heavy industrial cargo.
Operations We Cover
- Offshore modules (topsides, jackets, bridges)
- Process equipment (separators, compressors, generators)
- Subsea structures (manifolds, PLETs, templates)
- Drilling rig components
- Heavy industrial cargo (transformers, turbines)
What We Review & Witness
- Lifting engineering and rigging plans
- Crane and vessel lift capacity verification
- Pad-eye and lifting lug design
- Dynamic load factors and environmental limits
- Load-out and load-in procedures
- On-site lifting operations
Roll-On / Roll-Off (RORO) Operations
Specialists in RORO operations including self-propelled modular transporters, quayside and beach landings, semi-submersible load-outs, and barge deck cargo operations.
Operations We Cover
- Self-propelled modular transporters (SPMTs)
- Quayside and beach landings
- Semi-submersible vessel (Dockwise-type) load-outs
- Project cargo mobilization and demobilization
- Barge and deck cargo operations
What We Review & Witness
- Load-out engineering and SPMT configuration
- Ballast plan validation for float-on/float-off operations
- Quayside bearing capacity assessment
- Mooring and fendering plans
- On-site RORO operation witnessing
- Post-operation stability verification
Offshore Oil & Gas Operations
Full lifecycle support for offshore projects including towage of offshore assets, mooring and hook-up operations, subsea installation support, and pipeline assurance.
Operations We Cover
- Towage of offshore assets (rigs, barges, FPSOs)
- Mooring and hook-up operations
- Subsea installation support
- Pipeline and cable lay assurance
- Platform and FPSO installation
What We Review & Witness
- Tow route analysis and contingency planning
- Tow vessel suitability and bollard pull verification
- Mooring engineering and anchor pattern validation
- Installation method statements
- Pre-lay and post-lay surveys
- On-site installation witnessing
Our Process
The MWS Process
Phase 1
Documentation Review & Engineering Analysis
Comprehensive review of all engineering documentation to verify compliance with recognized standards, suitability of vessels, equipment, and procedures, adequacy of contingency plans, and structural integrity.
| Document Type | Purpose |
|---|---|
| Method Statements | Detailed step-by-step operation plans |
| Lift Plans & Rigging Drawings | Engineering for heavy lifts |
| Vessel Stability Books | Stability verification for all phases |
| Tow Route Analysis | Navigation, weather, and contingency planning |
| Structural Analysis Reports | Verification of structural integrity |
| Mooring Plans | Mooring configuration and anchor holding capacity |
| Ballast Plans | Ballasting sequence for float-on/float-off operations |
| Risk Assessments & HAZID/HAZOP | Identification and mitigation of operational risks |
Phase 2
On-Site Witnessing
Experienced surveyors deployed on-site to witness critical operations, verify pre-operation checks, confirm environmental conditions, and document observations with full authority to intervene.
| Operation | Scope |
|---|---|
| Heavy lifts | Load-out, offshore installation, deck-to-deck transfers |
| RORO operations | SPMT load-out, beach landings, semi-submersible float-ons |
| Towing operations | Pre-tow inspection, sail-away, offshore positioning |
| Mooring operations | Hook-up and positioning |
| Subsea installations | End-to-end witnessing and certification |
Phase 3
Certification & Reporting
Formal certification and comprehensive reporting upon successful completion of operations.
| Deliverable | Purpose |
|---|---|
| MWS Certificate | Formal certification required by insurers to maintain warranty coverage |
| Operation Report | Detailed record of operation, observations, and compliance |
| Post-Operation Assessment | Verification that vessel and cargo remained within design parameters |
The Last Mile
Why MWS Matters
The final phase of offshore operations—lifting, installation, or hook-up—is where risk is highest and insurance scrutiny is greatest.
Insurance Validity
Our certification ensures your insurance remains valid throughout the final critical phase
Safety Compliance
We verify all safety protocols meet international standards (IMCA, DNV, ABS)
Structural Integrity
Our analysis confirms lifting points, pad-eyes, and vessel configurations can withstand dynamic loads
Stability Assurance
We validate ballast plans, vessel stability, and cargo securing to prevent loss of stability
Journey Management
We verify tow route analysis, weather limits, and contingency planning for safe arrival
Dispute Prevention
Independent witnessing and documentation protect all parties in the event of a claim
Why Choose Us
Benefits of Using a Qualified MWS Provider
Insurance Validity
Our certification ensures marine insurance remains in force throughout the operation
Independent Expertise
No commercial interest in vessels, contractors, or cargo — complete impartiality
Local Presence
Based in Lagos, Port Harcourt, Abuja — immediate deployment across Nigeria and West Africa
Global Standards
MWS services delivered to international standards (IMCA, DNV, ABS, IMO)
Operational Credibility
Surveyors who have commanded vessels, executed heavy lifts, and managed offshore operations
Risk Reduction
Independent review identifies risks before they become incidents
Gulf of Guinea Experience
Deep knowledge of local conditions, ports, and regulatory environment
Our Team
Delivered by Experienced Mariners
Solutions Benchmark Marine MWS services are delivered by practitioners who have been at sea, on deck, and in the control room.
Master Mariners
Deep offshore experience and command history
Naval Architects
Specializing in heavy lift, stability, and structural analysis
Project Engineers
Extensive oil & gas operations background
Class-Approved Surveyors
Familiar with IMO, DNV, ABS, and classification society requirements
All Surveyors Have
- 15+ years maritime experience
- Gulf of Guinea operational knowledge
- Proven track record with IOCs, contractors, and insurers
- No commercial ties to vessels, contractors, or cargo
Typical Projects We Support
Offshore Module Installation
Lift engineering review, structural analysis, load-out witnessing, installation certification
Rig Move (Drilling Unit)
Tow route analysis, vessel suitability assessment, pre-move inspection, sail-away witnessing
Subsea Equipment Deployment
Installation method review, structural analysis, on-site witnessing
RORO Cargo Operations
Load-out engineering, SPMT configuration review, ballast plan validation, operation witnessing
Heavy Lift Transport
Lifting plan review, vessel stability verification, pad-eye inspection, on-site certification
FPSO Hook-Up
Tow engineering review, mooring analysis, positioning witnessing
Request MWS Services
Contact Our MWS Team
Our Marine Warranty Surveying team is ready to support your next heavy lift, RORO, or offshore oil & gas operation.
Contact Our TeamPhone
+234 (902) 222 2077Lagos
Plot 16B Oniru Palace Road, Victoria Island
Port Harcourt
No 26 Omerelu Street, GRA
Abuja
No 10 Tito Broz Street, Off Jimmy Carter Street, Asokoro
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