Thai cave rescue: the Australian crew

Australia has sent 19 people to help Thai authorities rescue the children and a coach trapped underground.

Australian doctor and diver Richard Harris is part of the team in Thailand helping rescue boys. (AAP)

THAILAND CAVE RESCUE TEAM: THE AUSTRALIANS

* The number of Australians helping with the dangerous Thai cave rescue operation varies depending on rotations, but up to 19 are involved.

* The group includes six Australian Federal Police divers supporting the Thai Navy, together with a liaison officer and interpreter.

* The divers formed part of the 'daisy chain' of rescuers who led four of the 12 boys out the cave system to the surface on Sunday.

* Richard Harris, a South Australian anaesthetist and diver was part of the medical team that determined the boys' fitness to undertake the arduous four kilometre journey.

* Dr Harris and his diving support partner were deployed on July 6.

* An AFP Commander and a specialist response group supervisor arrived on July 6 to support the dive team in a co-ordination role.

* The AFP have also deployed a liaison officer, media co-ordinator, psychologist and chaplain.

* Two Australian Defence Force specialists have been deployed to assist rescue operation planning and recovery.

* ADF personnel based at the Australian Embassy in Bangkok have also been supporting coordination in Chiang Rai.

* Two Department of Foreign Affairs and Trade crisis response team officers have been deployed to assist the Australians with co-ordination.