But Robin and husband Ricky have found it hard to give up the search for their only child. The couple from Lafayette, Louisiana, have spent the last three months living in Australia and spearheading their own search, long after New Zealand authorities gave up. This month, Ricky Wright earned his pilot's license. His aim was to fly the Australian coastline in hopes of spotting something. Anything.
They've spent $600,000 to pay for private plane searches. The money has come not only from their own savings but also from fundraisers, friends, family, even their daughter's college fund. Deeply religious, the couple says God has kept them strong and determined.
"We cannot assume the boat sank without evidence, and we think it's highly likely that it did not," Robin Wright says. "We know there's a chance the boat sank. There is a chance. But do you assume the worst and stop searching?"
Still, the search has to end at some point.
On Tuesday the Wrights, speaking by phone from the Sydney Airport, said they were returning to the U.S after running out of money and were unsure if they would return to Australia. Still, they won't lose hope until the anniversary of the boat's disappearance.
"After a year, I think the chances are down pretty low," Ricky Wright says. "But we will not give up on them. We know other people have survived up to a year."
The Wrights remain unhappy with aspects of the official search. They believe it began too late, wasn't extensive enough, and failed to restart when they presented authorities with a grainy satellite image they believe depicts the Nina adrift. New Zealand searchers say they did everything by the book and cannot do anything more. They say the military reviewed the ghostly image and concluded it was nothing more than the foam from a wave.
The Wrights last month met New Zealand's Transport Minister Gerry Brownlee in Wellington to express their concerns.
"They have enormous faith that the boat is still out there, that they're catching fish and freshwater, and will sooner or later make landfall. Unfortunately, none of our very extensive and expert-led search efforts concurs with that view," Brownlee says.
Ricky, 49, who brokers the sale of businesses, and Robin, 54, met at Louisiana State University. They home-schooled Danielle on their small farm, where their daughter loved to ride bareback on her horse, Copper. When Danielle was 15, the family took a sabbatical to sail the Caribbean.
"We sold everything and we went, and we don't regret it," Robin says.
She says while she and Ricky loved the tranquility, their daughter missed her friends and Facebook, and the Internet. So they sent her home every few months to reconnect and reduced a planned two-year voyage to 14 months.
The highlight for Danielle was a stop in Panama where she met David Dyche IV, one year her junior, who'd been raised aboard the Nina. The teens soon became inseparable and the parents also became close.
When captain David Dyche III and wife Rosemary last year called from New Zealand to ask the Wrights to help crew, Danielle asked if she could go alone, during a break from the University of Louisiana where she was majoring in psychology. Her parents weren't surprised — she'd grown to more appreciate her time sailing the Caribbean and also had become so independent.
They said goodbye to Danielle on Facebook the day before she set sail, and she told them how excited she was.
The Nina left from the tiny port of Opua in northern New Zealand on May 29 bound for Newcastle, near Sydney.