It's understood the tourist was on a multi-day LiveAboard dive trip from Cairns when tragedy struck ... returned to the boat from the water at Norman Reef when she lost consciousness.

Most tours of the Great Barrier Reef depart from Cairns, which is about a two-hour flight from Brisbane. A thriving destination of its own, Cairns boasts a bustling waterfront, staple seafood ...

The retiree excitedly boarded the Reef Experience tour boat ... in a “treacherous” current near Norman Island, about 60 kilometres northeast of Cairns. The South Australian tourist was found ...