Shipping Subsea Cables: A Guide

Pre-shipment Planning

Assess Cable Specifications

Obtain precise cable dimensions (length, diameter), weight, and material composition from manufacturer data sheets. Accuracy is paramount; errors can lead to improper handling, damage, and delays. For example, underestimating weight could result in insufficient securing, causing cable damage during transit. Note any specific handling requirements (e.g., bend radius restrictions).

Choose Shipping Method

Long cables typically require Breakbulk shipping on chartered vessels or project cargo ships. Heavy-lift vessels offer high capacity for oversized loads, while RoRo ships are suitable for shorter, easily-rolled cables. Containerization might be feasible for shorter sections. Vessel type selection significantly impacts cost and transit time; heavy-lift vessels are more expensive but faster for large cables.

Port Selection

Select ports with sufficient draft, heavy-lift cranes, secure storage, and proximity to cable-laying vessels. Pre-plan port visits to verify facilities and avoid delays. Security is a critical consideration.

Packaging & Securing

Coiling is critical; improper coiling can cause damage. Use custom-built cradles and specialized dunnage (e.g., wooden blocks, inflatable airbags) to secure coils on pallets. Weatherproof sheeting and anti-corrosion measures are essential.

Documentation

Prepare comprehensive documentation including cable specifications, packing lists, weight certificates, customs declarations, import/export licenses, and any required certifications from classification societies (e.g., DNV, ABS).

Insurance

Secure adequate cargo insurance, such as all-risks or Institute Cargo Clauses, to cover potential losses during transit. Coverage should reflect the cable's high value and potential for damage.

Loading & Securing

Coiling

Carefully coil cables according to manufacturer guidelines, using appropriate equipment to prevent kinks and damage.

Palletization/Cradling

Securely fasten coiled cables to pallets or cradles using robust lashing materials. Ensure the structure can withstand shipping stresses.

Securing on Vessel

Employ appropriate lashing and securing techniques, complying with maritime regulations. Consult with the vessel's crew to ensure securement.

Weather Protection

Protect cables from the weather using tarpaulins or other suitable coverings.

Transportation & Monitoring

Vessel Selection

Select a vessel with sufficient stability, deck space, and capacity for the cargo's size and weight.

Transit Monitoring

Track shipment progress and monitor environmental conditions throughout the voyage.

Communication

Maintain regular communication with all stakeholders (shippers, carriers, receivers).

Discharge & Delivery

Offloading

Coordinate offloading with port authorities, using appropriate heavy-lift equipment.

Delivery

Arrange transport from the port to the final destination.

Inspection

Inspect cables upon arrival for any transit-related damage.

Key Considerations

Permits & Regulations

Comply with international and national regulations for hazardous materials (if applicable) and out-of-gauge (OOG) cargo.

Liability

Clearly define responsibilities and liabilities among all parties involved.

Cost

Factor in all costs: packaging, handling, freight, insurance, and customs duties.

Environmental Regulations

Adhere to environmental regulations throughout the shipping process.

Risk Assessment & Mitigation

Conduct a thorough risk assessment and develop mitigation strategies for potential delays and other challenges.

Contingency Planning

Develop a comprehensive contingency plan to address unforeseen circumstances.

Shipping International offers expertise in subsea cable shipping.