Lower water revealed another victim, paramedic tells Dreamworld inquest

Mr Green was the first aid manager for the park with extensive qualifications and experience working across Australia as a paramedic.

Both men responded to the "code triple two blue" park-wide radio call that signalled a medical emergency had occurred. Mr Clark was about 30 metres away from the Thunder River Rapids Ride and arrived quickly.

Mr Green said he called up to the control room from WhiteWater World to clarify if it was a "code triple two blue", or rather a "code triple two grey", which would have been a mechanical issue rather than a medical emergency.

Both calls had been made over the radio by control room operator Nigel Irwin, who gave evidence to the inquest on Tuesday.

Verifying it was a medical emergency, Mr Green said he picked up his emergency response bag and drove a buggy to the Thunder River Rapids Ride.

Mr Clark said when he arrived a member of the public was in the water channel of the ride performing mouth-to-mouth on a person in the water. He decided to get the person out of the water because it was impossible to work on them in the channel.

He told the inquest that while he was working to resuscitate one victim in the chest-deep water in the channel, water draining from the channel had revealed another person.

Mr Clark was thanked by lawyers for the families of the victims for his efforts on the day.

Counsel assisting the coroner Ken Fleming, QC, asked both paramedics if they had sufficient equipment to move people out of the water channel.

Mr Clark said automated lifting equipment could have helped as responders had to use a hose in efforts to remove people from the trench.

Mr Green: In all honesty if you’d had the world’s leading cardio-thoracic surgeons, neurosurgeons and trauma surgeons with all their equipment, nothing would have changed the outcome.

Mr Fleming: In retrospect, first did things go as they should, for example the triple two calls, and the responses, is there any room for improvement in respect of that area?

Mr Green: I don’t know whether it would have changed anything, but from recollection the rapid ride alarm didn’t sound, it was just called as a triple two.

The rapid river alarm was an alarm sounded manually by the ride operator to warn of water pump failure, the inquest had earlier heard.

Mr Green said he didn’t believe anything could have changed the result of the tragedy, and while the paramedic team had repeatedly trained for cardiac arrests and other emergencies, “we’d never trained or practised or even thought anything like that could happen”.

Questioned further by barrister Toby Nielsen, representing the family of victim Roozi Araghi, Mr Green confirmed when he arrived at the scene there were only three patients visible.

Despite scanning the water to see if he could find any more victims, Mr Green said he didn't see the fourth patient who was underwater until the channel was drained.

Mr Nielsen asked if, in hindsight, Dreamworld policies for emergency responses could be improved.

"I’d have to say yes, purely because there was a patient there under the water that we weren’t aware of," Mr Green replied.

The inquest continues.