Young nurse reveals shock new details about the Bali snorkeling boat that capsized in rough seas killing an Australian executive on holiday

A woman who went on an Indonesian boat tour was left astonished by the lack of safety measures before another Australian lost her life on board the same vessel.

Anna Maree Blight, 39, died when the Sea Dragon 2 capsized while sailing between the port of Sanur, south Bali, and the Manta Point snorkel and dive site near Penida Island.

Two other Australians suffered severe burns in the accident which occurred about 8.30am local time on Friday.

Their family left a cryptic message about the incident online in the days after the freak wave slammed the boat.

Melbourne woman Stephanie, 27, said she had made the same trip on the Sea Dragon 2 one day prior to the accident.

She alleged the company did not offer life jackets to passengers on board despite the strong currents on the day.

She also raised concerns over the lack of pre-departure safety demonstrations.

When we reached the snorkelling spots, they showed us where to go but then pointed a couple of metres away and warned us that it was extremely dangerous for us to swim there, Stephanie told the Herald Sun.

Australian tourists, and Sea Dragon 2s two local crew, spent more than an hour clinging to the capsized vessel before being rescued on Friday

Melbourne executive Anna Marie Blight, 39, lost her life in the capsizing event

The Melbourne nurse said the currents appeared to be pulling water towards sharp rocks and cliff faces.

There were absolutely no safety procedures other than "follow them". We were never even offered life jackets or shown where they were, she said.

Stephanie said she felt uneasy to learn of Ms Blights death.

It absolutely poured down (with rain) the night before she went out, we thought how dangerous it looked out there, she said.

She was surprised the boat left port for Fridays fateful voyage.

Ms Blight had celebrated her 39th birthday two days before she was killed in the boating accident.

The finance executive was pronounced dead in Sanglah Hospital.

There were 13 people, including 11 Australian tourists, on board with Ms Blight.

Gabriel Hijniakoff, 29, and his partner Cintamani Tam Warrington were treated for burns and required urgent medical attention. 

Local police spokesperson Agus Widiono said a freak wave hammered the boat before a second large surge overturned the vessel.