Thomas Keating, 22, acknowledged charges following the crash off Kata Beach on February 5 that killed Emily Collie, 20.

Ms Collie, from Victoria, suffered severe neck and shoulder injuries and was later pronounced dead in hospital.

Earlier, Keating issued a statement to express his “unbearable sorrow” over the death of his “soulmate”, taking responsibility for Ms Collie’s death and apologising to her parents.

The pair, who had never ridden jet-skis before, were on the last day of a holiday on the resort island.

Police said Keating admitted the incident and an autopsy had confirmed that Ms Collie had drowned.