Australian border authorities may need to restructure their patrols following the undetected arrival of 66 Sri Lankan asylum seekers apparently hoping to find refuge in New Zealand.
Their appearance at Geraldton, north of Perth, shocked authorities whose attention is focused heavily on the northwest approaches to the mainland, where most boats are intercepted near Christmas Island or Ashmore Reef.
The boat, flying a New Zealand flag and displaying signs asking for help in getting to New Zealand, is believed to have followed a route that extended the normal time at sea by more than 40 days.
The boat is the first to have reached the mainland in five years.
Customs and Border Protection officials have told Home Affairs Minister Jason Clare the boat appeared to have sailed directly from Sri Lanka on a course far to the south of most Indian Ocean crossings.