ExxonMobil is advancing its plans to decommssion the first group of its steel platform jackets and two monotower platforms in the Bass Strait offshore south-east Australia.

The US supermajor operates 19 offshore platforms in Bass Strait, some of which have been operating for decades — 15 are steel pile jacket platforms, two are concrete gravity structures and two are monotowers.

There is also one steel pile jacket riser access tower.