A possible sighting of the missing launch Erie and its skipper William Kerry Blair has been eliminated as being another boat, police say.
Sergeant Bill Talbot said police had established that potential sighting on Monday was not Mr Blair's vessel.
Police are today no closer to establishing what Mr Blair's intended destination was when he left Erie Bay in the Marlborough Sounds on Saturday afternoon.
Weather and sea conditions since then have been good and Mr Blair, 55, is considered a capable seaman.
The boat is equipped with a marine radio and a locator beacon, neither of which has been used.