Well Vanuatu is one of our Pacific neighbours, a source of RSE workers arriving here, and had been relatively C19 free.
The other aspect is how come a worker with Covid ended up in the sea? You hear stories of how some crew are treated, if true then biffing a dead body over the side for the sharks - in the hope that you can cover up an onboard epidemic of Covid - lest that disrupt "normal operations" and profit for the owners, it seems probable enough to be newsworthy.
The ship is now in Sydney.
No, the Ship WAS in Sydney before it went to Vanuatu
"Inge Kosan bulk liquid ship left Port Moresby in Papua New Guinea and docked in Sydney for 24 hours from March 31. It left for Vanuatu the next day."