The ATSB has found that the submarine ethane gas pipeline rupture in Port Phillip on 13 December 2008 was the result of attempting to clear the container ship APL Sydney's anchor, which had snagged the pipeline.
The Australian Transport Safety Bureau investigation found the ship's anchor had been let go too close to the pipeline in the gale force winds and insufficient anchor cable was deployed. The anchor dragged towards the pipeline and snagged it because appropriate avoiding action was not taken.
At 1428 on 13 December, APL Sydney's anchor was let go in Melbourne's Outer Anchorage, about 1…