Offshore Cargo Operations

Transcription

1 Offshore Cargo Operations Dev Paranjape Marine Supervisor, Offshore Support Marine Safety Form, Perth, 9 June

2 Offshore Cargo Supply Related Incidents Recent Events A recent serious incident in the Australian Offshore Industry has highlighted the risks associated with cargo deck operations on Offshore Support Vessels. Offshore Cargo Operations 101 Routine task which is conducted frequently offshore- on most OSVs on a daily basis. Involves lifting on (backload) and lifting off (discharge) cargo units from the vessel deck- to supply the offshore platform or rig. Cargo units are usually containerized. Loads are pre-slung- and undergo a pre load out inspection ashore and on the rig before being placed on vessel deck. 2

3 Complacency and Error Traps Routine tasks can result in complacent behaviours and falling into error traps such as- Anchoring bias - Relying primarily on the outcome of previous task executions. Knowledge bias - Relying primarily on current knowledge and overlooking the safest options. Optimism bias - The tendency to underestimate the true risk involved in a task. Overconfidence bias - over estimation of one s own ability to avoid potential harmful outcomes of a task. J.K. Wachter, P.L. Yorio / Accident Analysis and Prevention 68 (2014) 3

4 Look back Fatality Incident- December 1993, NWS-Australia Vessel Type- Offshore Supply Vessel (Open Stern) Large wave came over the open deck. IP crushed between vessel rubbish skip and empty skip when moved by sea water. Impact- Boat shaped skips were banned from use in offshore locations. (Photo Courtesy ATSB Report) 4

5 Vessel Type- Offshore Supply Vessel Look back Fatality Incident- September 2005, Qatar Container swung towards starboard while being lifted to J/U rig. IP crushed between vessel container and a power pack. 5

6 Look back Fatality Incidents Vessel Type- AHTS, North Sea, June 2004 Vessel Type- AHTS, Vietnam, November 2010 IP was caught between the wireline support frame and the skip and his chest was heavily crushed when without warning, a larger than usual roll of the vessel caused the wireline support frame to shift. Three deck crew members took refuge in the vicinity of an empty mixing tank and filter pod skid on the starboard stern of a supply vessel. A sudden swell- about 4-6 meters hit the vessel stern, causing the empty mixing tank (est weight 5 MT) to skid towards the filter pod; and knocked the deceased who was standing in front of the mixing tank, resulting in fatal injury. 6

7 Look back DAFW Incident- September 2004, North Sea Vessel Type- Offshore Supply Vessel While preparing to unload cargo from supply vessel to installation, a large wave hit the stern of the boat. The wave hit two seamen on deck, and they were moved approx 10m along the deck. They stopped when they hit containers on the deck. IP was injured and sent ashore for treatment. At the same time a 6m long cargo basket was also moved by the wave. 7

8 Look back DAFW Incident- April 2005, North Sea Vessel Type- AHTS During water transfer operations which started after back loading was just completed. Swell carried two of the seamen up the deck along with an unsecured scaffolding basket. This resulted IP s leg pinned between the scaffolding basket and another box, breaking his leg. 8

9 Look back DAFW Incident- Jan 2010, Gulf of Thailand Vessel Type- AHTS IP was removing lashing from a pallet when a large wave came over the deck. Pallet stuck IP and resulted in a Leg fracture. 9

10 Lessons learnt Understanding of risk while performing cargo loading/unloading operations on Offshore Support Vessels- including open stern vessels. Proper risk assessment for complex systems or activities requires awareness and understanding of similar prior incidents. Offshore cargo loading/unloading operations between the facility and the vessel are not recognised as combined operations. 10

11 Safe Work Procedures Why are they important Provide steps necessary to safely execute tasks free of injury and illness. Provide important and consistent information to workers of what is expected of them from a safety perspective. Play a vital role in ensuring in ensuring that routine, complex tasks are executed safely. J.K. Wachter, P.L. Yorio / Accident Analysis and Prevention 68 (2014)) 11

12 Objectives: Chevron ABU Offshore Cargo Handling Procedures Formalise information sharing and interactions. Ensure cargo restraint. Ensure pre-planning of loading and unloading operations. Increase levels of communications. Reduce the risk of unplanned movement of cargo on the deck of a vessel. Reduce time alongside of offshore facility. 12

13 Plan and Prepare Failing to plan is planning to fail.. If you do not have a plan you do not know when it changes. If you do not know what is changing you cannot manage change safely. 13

14 Stowage Planning Key considerations while planning Block stowage and number/type of CCUs in a block. Two stage lashing of each block. Emergency escape routes. Open sterns and possibility of green water on deck. Weather and sea state conditions offshore. Strong point, lashing points and post mounts. Cargo dimensions and weight. Placement to minimise unplanned movementfriction coefficients. Stability and discharge sequence to minimise time alongside facility. 14

15 Stowage Planning (Backload) 15

16 Environmental Limits Weather and Sea State Trigger points for review of cargo operations alongside- Wind exceeding 25 knots Significant wave height 2.5m 5 deg vessel roll or pitch Stop points- Winds exceeding 30 knots Significant wave height 3.0m 10deg vessel roll or pitch Stern to weather working to be avoided on open stern vessels 16

17 Communications Offshore Facility and Vessel Interface: Agree on sequence of offload and backload. Any significant changes trigger a formal review. Only one block of cargo to be unlashed at any time. Cherry Picking of cargo to be avoided. If there is no other option then a full risk assessment required. Vessel to flag idle time alongside facility in excess of 15 minutes. Vessel to move away from facility if idle time exceeds 30 minutes after notifying facility minimise risk alongside. 17

18 Collaboration Working together is the key: Significant consultation and collaboration to get all stakeholders aligned. Multiple engagements with vessel crews, management and internal customers. Consistent and unwavering support from Management and Leadership. Continuing work to raise awareness with partners and peers from the industry. 18

19 QUESTIONS? 19