State and federal leaders will renew efforts to prevent ships from arriving with coronavirus-infected crew members after recent scares in Western Australia.
Ten crew members of the BBC California have tested positive to the virus since the cargo ship docked in Fremantle this week.
They remain aboard, along with a critically-needed engineer who has tested negative and is being kept in separate quarters.
A further three crew members who have tested negative have been moved to hotel quarantine in Perth to prevent them being infected.
The BBC California had visited ports in virus-plagued Indonesia before docking in Fremantle.
Another vessel which recently visited Indonesia, the Mattina container ship, has also had an outbreak after departing Fremantle bound for New Zealand.
WA authorities have contacted 25 local ship workers who had contact with the ship but are confident none were infected.
Premier Mark McGowan raised the issue at Friday's national cabinet meeting.
He said state and federal transport ministers had agreed to examine what could be done in conjunction with major shipping companies, with a focus on preventing crew members from roaming the streets while in Indonesia.
"The shipping companies need to put effort into keeping their crews on board when they're in Indonesian ports," he told reporters.
"The prime minister was very good about it. He acknowledges it's a major problem."
WA has closed its borders to NSW, Victoria, Queensland and South Australia as the eastern states deal with outbreaks of the highly infectious Delta variant.
NSW recorded 136 new locally-acquired cases on Friday, almost four weeks after Greater Sydney and its surrounds were locked down in a bid to suppress the virus.
A plan to ramp up the NSW vaccine rollout was discussed at national cabinet but other states, including WA, have rejected suggestions they should divert Pfizer doses to Sydney's hotspots.
Mr McGowan said he was "more confident after today" that NSW would get on top of its outbreak.
But he warned counterpart Gladys Berejiklian that it was not the time for "half-baked" measures and vaccinations were "not a substitute for a lockdown".
"Vaccinations are how you prevent having a lockdown - they're not how you deal with an existing outbreak," he said.
"I think that's fundamental and people need to understand that.
"I see all these images of people (in Sydney) wandering around outside as though nothing's happening, nobody's wearing a mask ... it's not a time for half-measures."
WA will expand its sluggish vaccine rollout later this month after receiving additional supplies of the Pfizer vaccine.
Two new mass vaccination clinics will open, allowing for an additional 10,000 bookings per week.
About 13 per cent of West Australians aged 16 and over have received their first vaccine dose, the lowest rate of any state or territory.
WA recorded no new cases on Friday. There are 14 active cases.
Australian Associated Press