Project Overview

When a 98,000 DWT bulk carrier battled severe weather conditions during its Pacific Ocean crossing, the vessel's accommodation gangway sustained catastrophic structural damage from heavy seas and violent ship movements. The gangway—a critical safety component that provides the primary means of safe crew access between vessel and shore—suffered twisted structural members, fractured welds, bent stanchions and compromised mechanical systems. Upon arrival at Diliskelesi Port in Izmit with a full cargo of scrap metal, the vessel faced a critical situation: the gangway was deemed unsafe for use, creating both a regulatory compliance issue and a practical operational crisis.

The challenge extended beyond simple repair work. Maritime regulations mandate that all vessels maintain functioning accommodation ladders as essential safety equipment and port state control inspections could detain vessels with defective gangways. The vessel's tight scheduling—with cargo operations already underway and a fixed departure window—demanded that repairs be completed without disrupting commercial operations or causing delays that would trigger penalty clauses. Additionally, the gangway's substantial weight (exceeding 3 tonnes) and complex structural geometry required specialized heavy-lift equipment, precision engineering capabilities and experienced marine welders.

Seaway Ship Services mobilized a comprehensive repair response that would showcase our full spectrum of capabilities: structural engineering, heavy-lift operations, certified welding, load testing and classification society coordination. Our team executed a complete gangway restoration program including dismantling the damaged structure using ship's cranes and mobile lifting equipment, transporting the gangway to our shore-side workshop facility for detailed repair, conducting extensive structural analysis and weld repairs, performing precision alignment and mechanical restoration, executing certified load testing to 150% of safe working load, obtaining classification society approval and reinstalling the fully certified gangway—all within an aggressive 4-day timeline that aligned perfectly with the vessel's cargo operations schedule.

⚠️

The Challenge

The vessel arrived with severely damaged accommodation gangway following Pacific Ocean storm damage—twisted frame members, fractured welds, bent handrails and compromised hydraulic systems. The gangway was completely unsafe for use, creating both safety hazards and regulatory compliance issues. Port state control regulations require functioning accommodation ladders and defective equipment could result in vessel detention.

Operational constraints included: vessel loaded with 90,000 tonnes scrap cargo, ongoing cargo operations that couldn't be disrupted, 4-day port stay requiring parallel repair and cargo work, 3+ tonne gangway requiring heavy-lift capability, complex structural geometry needing precision repairs, classification society certification requirements, load testing to 150% safe working load and reinstallation requiring perfect alignment with vessel's embarkation point during cargo operations.

Our Solution

Seaway deployed integrated heavy-lift and structural repair capabilities combining mobile cranes, transport equipment, workshop facilities, certified welders and testing apparatus. Our approach: coordinated dismantling using ship's gear and shore cranes without disrupting cargo operations, secure transport to our shipyard workshop in Yalova with specialized heavy transport, comprehensive structural assessment identifying all damage points, precision straightening of bent frame members using hydraulic presses.

Complete weld repairs by coded welders following approved procedures, replacement of damaged components including handrails and mechanical parts, sandblasting and protective coating application, hydraulic system overhaul and testing, precision load testing using calibrated hydraulic test equipment to 150% SWL, class surveyor attendance and certification, careful transport back to vessel and precision reinstallation with final alignment verification. All work completed in parallel with cargo operations within 4-day window.

Execution Process

Day 1: Assessment, Planning & Dismantling Operations

Initial boarding and comprehensive damage assessment by structural engineers and classification surveyor. Documentation of all damage including photographic evidence, dimensional surveys and structural analysis. Development of detailed repair plan including material requirements, welding procedures and timeline coordination. Coordination with vessel's cargo operations to ensure minimal interference. Preparation of lifting arrangements and rigging plans for safe gangway removal. Positioning of mobile crane equipment at quayside alongside vessel. Careful dismantling of damaged gangway using combination of ship's deck crane and shore-based mobile crane. Securing of gangway for transport with proper load distribution and tie-down arrangements. Transport of 3+ tonne gangway structure from Diliskelesi Port to Seaway's Yalova shipyard facility using specialized heavy transport vehicle—distance of approximately 45km requiring careful route planning and oversized load permits.

Day 2: Structural Repair & Welding Operations

Positioning of gangway in workshop on dedicated fabrication jig allowing access to all damaged areas. Detailed marking and preparation of all repair locations following structural engineer's assessment. Removal of fractured welds and damaged material using plasma cutting and grinding. Precision straightening of bent main frame members using hydraulic press equipment—critical operation requiring careful monitoring to avoid material damage. Heat straightening of twisted structural components where applicable using controlled heating techniques. Preparation of weld joints including beveling, cleaning and fit-up verification. Execution of structural weld repairs by coded welders certified for marine structural welding. Welding procedures followed approved WPS (Welding Procedure Specifications) for marine-grade steel. Critical welds included main frame connections, stanchion bases, platform attachments and handrail supports. Replacement of severely damaged components including bent handrails, twisted stanchions and compromised mechanical parts. Fabrication of new components where repair was not feasible. Installation of reinforcement plates at high-stress locations to improve structural integrity.

Day 2-3: Mechanical Systems, Surface Treatment & Testing

Complete overhaul of gangway mechanical systems including hydraulic winch mechanism for raising/lowering operations. Inspection and replacement of worn components including sheaves, wire rope, hydraulic cylinders and control valves. Testing of hydraulic system for proper operation and leak-free performance. Inspection and repair of safety features including handrails, safety chains and platform non-slip surfaces. Installation of new safety equipment including life buoys, safety nets and lighting fixtures. Comprehensive sandblasting of entire gangway structure to SA 2.5 cleanliness standard for optimal coating adhesion. Application of approved coating system including zinc-rich primer, epoxy intermediate coats and polyurethane topcoat for long-term corrosion protection. Preparation for load testing including installation of certified test equipment and instrumentation. Positioning of gangway in test rig with proper support and measurement apparatus. Progressive load testing starting at 100% safe working load and increasing to 150% SWL as required by classification society rules. Monitoring of structural deflections, stress points and deformation during load testing. Hold time at maximum test load to verify structural integrity and absence of permanent deformation. Class surveyor attendance and witnessing of all load testing procedures. Successful completion of load test with zero detectable permanent deformation and all acceptance criteria met.

Day 3-4: Transportation & Reinstallation

Preparation of gangway for transport including protective covering of critical areas and securing of movable components. Loading onto heavy transport vehicle using workshop crane equipment. Return transport from Yalova shipyard to Diliskelesi Port coordinating with vessel's cargo schedule. Arrival at quayside with mobile crane equipment pre-positioned for lifting operations. Careful coordination with vessel's deck crew and cargo operations to schedule gangway installation window. Precision lifting of 3+ tonne gangway using mobile crane with certified rigging and experienced operators. Positioning of gangway at vessel's embarkation point requiring exact alignment with deck mounting brackets. Connection of gangway to vessel's structure using high-strength bolts with torque specifications verified. Installation of safety equipment including handrail extensions, lighting and safety signage. Connection of hydraulic power supply from vessel's system to gangway winch mechanism. Operational testing of raising and lowering functions with full crew safety procedures in place. Verification of proper alignment at both raised and lowered positions. Final inspection by classification surveyor including operational demonstration and documentation review. Issuance of class approval certificate and repair documentation for vessel's records. Training session with vessel's crew covering proper operation, safety procedures and maintenance requirements. Final handover to chief officer with complete documentation package including repair records, load test certificates, coating specifications and operational manuals.

Project Gallery

Technical Specifications

🚢

Vessel Details

98,000 DWT

Bulk carrier loaded with 90,000 tonnes scrap metal cargo

⏱️

Project Duration

4 Days

Complete repair from dismantling to reinstallation

⚖️

Gangway Weight

3+ Tonnes

Complete accommodation ladder structure

🔧

Load Testing

150% SWL

Certified load testing to classification requirements

📍

Location

Diliskelesi, Izmit

Workshop repairs in Yalova (45km transport)

Certification

Class Approved

Full classification society certification