The couple have sailed around the world the equivalent of four times.
"I like the sea. I am in love with it, and always I thought that one day I would make a big trip," says Mr van Hille.
Mr and Mrs van Hille moved to the island of Reunion after marrying, where they spent fifteen years working as teachers, while raising their two girls.
After seeing their children through tertiary education, they spent time in French Polynesia teaching - it was here they bought their boat and set sail.
"All our work, in the house, on the boat. We do it by ourselves," says Mrs van Hille.
They first arrived in Tauranga in 1998, a year after the Tauranga Bridge Marina was opened.
But they're not ready to settle for good - just yet.
"No plan at all. Maybe we stop tomorrow, maybe we get another ten years? Who knows," says Mr van Hille.
The couple will return to their home in Provence over the European summer to produce wine and spend time with their children and grandchildren.