KUP 35 Have knowledge of safe handling, stowage and securing of cargoes, including dangerous, hazardous and harmful cargoes, and their effect on the safety of life and of the ship

The safe handling, stowage, and securing of cargoes, particularly dangerous, hazardous, and harmful substances, is a critical competency for maritime officers. This lesson delves into the complexities of cargo management, emphasizing the importance of proper procedures and the potential consequences of mishandling.

The Evolution of Cargo Handling

Cargo handling practices have evolved significantly over the years, driven by technological advancements and lessons learned from maritime incidents. The introduction of containerization in the 1950s revolutionized the shipping industry, leading to increased efficiency but also presenting new challenges in cargo securing and stability management.Consider the case of the MSC Napoli in 2007. This container ship encountered severe structural failure in heavy weather, partly due to the overloading of containers and inadequate lashing. The incident highlighted the importance of accurate cargo weight declarations and proper securing techniques, leading to industry-wide improvements in container management practices.

Dangerous Goods Management

The transportation of dangerous goods by sea is governed by the International Maritime Dangerous Goods (IMDG) Code. This comprehensive set of regulations classifies hazardous materials into nine classes, each with specific handling, stowage, and segregation requirements.Let’s examine a real-world scenario involving the transportation of Class 1 explosives:A general cargo vessel is tasked with carrying a shipment of Class 1.1 explosives alongside general cargo. The ship’s officers must consider several factors:

1. Stowage location: Class 1 explosives must be stowed in a designated magazine, away from sources of heat and potential ignition.
2. Segregation: The explosives must be segregated from other dangerous goods according to the IMDG Code segregation table.
3. Fire protection: Ensure that appropriate fire-fighting equipment is readily available and that the crew is trained in its use.
4. Security: Implement measures to prevent unauthorized access to the explosive cargo.
5. Documentation: Ensure all necessary documentation, including the dangerous goods manifest and stowage plan, is accurate and readily available.

Failure to adhere to these regulations could result in catastrophic consequences, as demonstrated by the explosion of the SS Mont-Blanc in Halifax Harbor in 1917, which resulted in approximately 2,000 deaths and widespread destruction.

Bulk Cargo Challenges

Bulk cargoes present unique challenges, particularly with regards to cargo liquefaction. The International Maritime Solid Bulk Cargoes (IMSBC) Code provides guidelines for the safe carriage of bulk cargoes, including testing procedures to determine the transportable moisture limit (TML) of a cargo.Consider the case of the Bulk Jupiter, which sank in 2015 while carrying a cargo of bauxite. Investigations suggested that cargo liquefaction was a likely factor in the vessel’s rapid sinking. This incident led to increased scrutiny of bauxite cargoes and revisions to the IMSBC Code.To mitigate the risks associated with bulk cargoes, officers should:

1. Ensure accurate cargo declarations, including moisture content.
2. Conduct visual inspections of the cargo before and during loading.
3. Monitor weather conditions, as rain during loading can increase the cargo’s moisture content.
4. Be aware of the cargo’s angle of repose and its implications for stability.
5. Implement appropriate ventilation procedures for cargoes prone to off-gassing or self-heating.

Heavy Lift Operations

Heavy lift operations require meticulous planning and execution. The case of the Jumbo Vision in 2021 illustrates the potential consequences of improper heavy lift handling. During the loading of a 480-ton yacht in Palma de Mallorca, one of the lifting slings failed, causing the yacht to fall and sustain significant damage.When planning a heavy lift operation, consider the following:

1. Conduct a thorough risk assessment.
2. Ensure all lifting equipment is certified and appropriate for the load.
3. Calculate the effects on the ship’s stability and stress.
4. Plan the lift taking into account weather conditions and sea state.
5. Brief all personnel involved and ensure clear communication throughout the operation.

Refrigerated Cargo Management

Refrigerated (reefer) cargoes require constant monitoring and care. Temperature-sensitive goods, such as pharmaceuticals or fresh produce, can be rendered worthless if not maintained at the correct temperature.For instance, a shipment of bananas typically requires a temperature of 13.3°C (56°F) and relative humidity of 90-95%. Officers must ensure:

1. Pre-cooling of cargo holds or containers before loading.
2. Regular temperature checks and adjustments throughout the voyage.
3. Proper air circulation within reefer containers or holds.
4. Immediate reporting and action on any temperature alarms or discrepancies.

Cargo Securing and Care During Voyage

Proper cargo securing is crucial for preventing cargo shift during the voyage. The Cargo Securing Manual (CSM) provides ship-specific guidelines for securing various types of cargo.The case of the MV Cougar Ace in 2006 demonstrates the importance of proper cargo securing. The vessel developed a severe list while adjusting ballast, leading to the shifting of its cargo of vehicles. Although the ship was eventually salvaged, the incident resulted in the total loss of its cargo of 4,703 vehicles.During the voyage, officers should:

1. Regularly inspect cargo lashings and securing points.
2. Re-tighten lashings as necessary, particularly after periods of heavy weather.
3. Monitor the ship’s motion and weather forecasts to anticipate potential risks to cargo.
4. Maintain appropriate ventilation for cargoes that require it.
5. Conduct regular checks for any signs of cargo damage, leakage, or shifting.

Conclusion

Safe cargo handling, stowage, and securing are complex tasks that require a deep understanding of various cargo types, regulations, and potential risks. By studying past incidents and continuously updating their knowledge, maritime officers can ensure the safe transportation of goods while protecting their vessel, crew, and the environment.The key to successful cargo management lies in thorough planning, strict adherence to regulations and best practices, effective communication, and constant vigilance throughout the voyage. As the shipping industry continues to evolve, with new cargo types and larger vessels, the importance of expertise in this area cannot be overstated.

Read more:

Marine Accident Investigation Branch. (2008). Report on the investigation of the structural failure of MSC Napoli. Southampton: MAIB.

Ruffman, A., & Howell, C. (1994). Ground Zero: A Reassessment of the 1917 Explosion in Halifax Harbour. Nimbus Publishing.

Marine Accident Investigation Branch. (2016). Report on the investigation of the loss of Bulk Jupiter. Southampton: MAIB.

The Yacht Report. (2021). 480-ton yacht falls from crane in Palma. Retrieved from [URL redacted].

National Transportation Safety Board. (2008). Marine Accident Report: Heeling Accident on M/V Cougar Ace. Washington, DC: NTSB.