A Texan company searching for missing yacht Nina is urging New Zealand authorities to resume the search.
Six Americans and a British man were on the 85-year-old schooner when it left the Bay of Islands for Australia. It has not been heard from since early June this year.
New Zealand's Rescue Co-ordination Centre called off the official search in July, but private company Equusearch from Texas has been continuing to look for the boat.
Senior adviser Ralph Baird says the initial search by the centre was not exhaustive.
"The amount of area that they searched in such short a period of time makes people wonder how thorough the search was and whether they could find the Nina in that short a period of time in that large an area."
Mr Baird says planes are searching due west of Norfolk Island and north-east of Lord Howe Island on Monday.
Robin Wright, the mother of 19-year-old crew member Danielle Wright, says new evidence places the yacht in that area and wants New Zealand authorities to start looking again.
"We found the satellite image of a boat that's the same width and length and shape. There's no wake behind that boat. We feel pretty confident that we're looking at Nina."
John Glennie, who spent 119 days at sea in the capsized trimaran Rose Noelle in 1989, has approached the Rescue Co-ordination Centre, saying that he is living proof of survival at sea.
However the centre's general manager, Nigel Clifford, says there is no compelling case for resuming the search.
"It's an enormously difficult thing to do to search these vast areas of ocean without knowing at least an approximate position so that you can plot the drift and see where the the vessel or the object might have gone to.
"And at the moment, there's just no clear position from which to start with and there are no clear times or pictures or communications or anything that would make a search worthwhile."
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