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When the vessel YM Efficiency lost 81 shipping containers overboard during heavy seas off the Newcastle-Port Stephens coast on 1 June 2018, the Australian Maritime Safety Authority (AMSA) faced a significant maritime clean-up operation.
AMSA carried out its compliance role to inspect and detain the vessel once it arrived in port and supplied its Challenger Jet to track missing containers. Contractors hired by the ship’s insurers collaborated with NSW Roads and Maritime Services to carry out the initial shoreline clean-up operation.
Over 1000 tonnes of debris was cleared from around 400 kilometres of coastline, including plastics, wooden furniture, tyres and paper products.
A thorough search for the lost containers using a side scan sonar and a remotely operated underwater vehicle (ROUV) was used to match the containers with the ship’s manifest. Five containers have been recovered and there are 16 containers yet to be found.
Removing the containers
Removal and disposal of the 60 containers, is scheduled to start in March 2020. The salvage operation is expected to take a month to complete, subject to weather conditions.
Ardent Oceania is contracted to recover the containers and associated debris from the seabed using the offshore support vessel, MV Pride, which is designed for offshore salvage and construction operations.
MV Pride is 130 metres long and offers 2,000 square metres of deck space and 6,000 tonnes of cargo carrying capacity. MV Pride is equipped with a 250-tonne active heave -compensating subsea crane and a 35-tonne auxiliary crane. The MV Pride contains two ROUV hangars with a dedicated ROUV control room.
An ROUV will support the operation to:
- manage crane strops and wires
- cut containers to separate them
- create water egress holes
- pick up loose debris.
A crane will lift each container into a custom-fabricated metal basket, which has small mesh to minimise spillage. On surfacing, the basket and container will be lifted to drain then the container removed by crane for storage on the ship’s deck.
If a container can’t be lifted into the basket, the crane will load debris and container pieces into the basket using a hydraulic grab. Loose debris will be stored in enclosed bins and a small vessel will retrieve any debris that may escape. A crane grab aided by the ROUV will clear the site and the ROUV will carry out surveys to ensure debris is cleared.
Storing the debris
Port of Newcastle is hosting a receiving area where all recovered waste will be managed. The area will be bunded to prevent debris and pollution from entering port waters. Waste will then be classified, stored, transported and disposed of according to NSW Environmental Protection Authority Waste Classification Guidelines.
Since the initial clean up AMSA has attempted to engage with the Taiwanese owners of the YM Efficiency, Yang Ming, about their ongoing responsibility to remove the remaining containers from the seafloor. Yang Ming and their insurers Britannia P&I have taken a position that they do not believe that the containers constitute pollution.
The ship’s owners Yang Ming are responsible for retrieving containers and meeting the costs of retrieving containers - the principle being that the polluter pays. Yang Ming’s failure to fulfil their obligations to retrieve the containers has meant that AMSA has stepped in to start the recovery operation. AMSA intends to recover all costs associated with the clean-up from Yang Ming and their insurers Britannia P&I.
Staying in touch
Updates will be available on our operational updates web page in the lead up to operations and throughout March, in addition to images and footage.
You can also check the website for information on community information sessions taking place in February.
If you would like to be added to our mailing list, email us at: OperationRecovery@amsa.gov.au