Sailing through the 15 islands of the Cooks, across two million square kilometres of ocean, with only the stars, wind and ocean currents to guide them.
That's the journey a crew of young Cook Islanders has embarked on, aboard a traditional vaka, to learn how their tipuna navigated across the great blue moana.
Alannah Smith has been on board for the northern part of the voyage, and spoke to Corin Dann.
