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Keeping a high sided vessel alongside in strong winds

Lessons from UK MAIB's Marine Accident Reports The UK MAIB has issued its Safety Digest for this year including lessons learnt from maritime accidents.One case highlights the challenge of keeping a high sided vessel alongside in strong winds.The IncidentVessel 1:A large high sided ro-ro vessel was berthed alongside in strong winds at a busy European port. The master had decided to use four headlines, four stern lines, two forward spring lines and two aft spring lines to keep the vessel secure alongside during cargo operations, a decision he based on the weather forecast available at the time of arrival.The strong offshore winds were beam on to the vessel, causing significant loading on the vessels mooring lines. As cargo operations progressed the wind began to increase, and gust to 42 knots, which caused all four stern lines, the two aft spring lines and one forward spring line to part, and the stern to veer quickly off the berth. This caused damage to the stern ramp, and the vessel to swing across the river and ground on the opposite bank.The crew were able to close the stern ramp to prevent any further damage, and the main engine was started. Eventually, the vessel ...

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Correct Tool is Key to Safe Maintenance

Lessons from UK MAIB's Marine Accident Reports The UK MAIB has issued its Safety Digest for this year including lessons learnt from maritime accidents. One case highlights how important is to always use the correct key for safe maintenance.The IncidentA ships engineer tested a spare fuel injector prior to use and found that the atomisation pressure regulating screw had been incorrectly set. The manufacturer had provided a clamping device to hold the injector, and a key to adjust the pressure regulating screw. To access the screw, it was necessary to remove a counter nut. The manufacturers tool for removing the counter nut was not held on board, therefore an ad hoc tool had been fabricated by ships staff.Despite his best efforts, the engineer was unable to loosen the counter nut with the ad hoc tool using the manufacturers clamping device. He then took the injector to the engine room workshop where he continued his efforts to release the counter nut with the injector secured in a vice. Again these efforts were unsuccessful as the tool constantly slipped out of the counter nut slot. After some consideration, the engineer thought he might be able to drill out the counter nut using ...

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Need for planned maintenance schedules on critical equipment

Lessons from UK MAIB's Marine Accident Reports The UK MAIB has recently issued the firstSafety Digest for this year which includes lessons learnt from maritime accidents. One case refers to over-speed damage and highlights how important planned maintenance schedules on critical equipment are.Over Speed DamageFollowing a main engine overhaul on board a dredger, the engine was started for a trial run. After the initial start, the engines speed gradually increased over its normal operating limit. None of the over-speed protection devices, or the operation of the mechanical emergency stop, stopped the engine, which was eventually shut down by covering its air intakes and starving the engine of air. No secondary damage was apparent but two defects, which could have contributed to the over speeding of the engine and the failure to shut down the engine, were rectified. The engine was then tested but the test run did not include the operation of the engines protection devices.A few weeks later, the dredger was stopped while on passage to enable a fractured high pressure fuel line on its main engine to be repaired. Once the repair had been completed, the engine was re-started, but its speed again quickly increased beyond normal operating ...

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