Tauranga man Jack Entwisle volunteered on the Anastasis for five years as the fire officer, between 1979 and 1985.
Eighteen months ago he had the idea to get the international crew from the ship's first 10 years back together and formed a reunion committee with his wife and four other Tauranga residents who had also been on the ship.
About 100 people had registered to attend this weekend's reunion at Bethlehem Baptist Church - some coming from Austria, England, France, Scandinavia, the US, Australia, as well as a few from New Zealand.
Mr Entwisle said it would be amazing to see everyone again, especially those who grew up on the boat, married on the boat and now had children they would be bringing over.
Children on the boat came from all over the world and attended the International Christian School on board.
During his five years on the boat it was renovated for three years in Greece and got the final touches for six months in California before returning to travel the length of New Zealand collecting supplies. Rebecca Savory