Reddit reviews The Last Navigator: A Young Man, an Ancient Mariner, the Secrets of the Sea

I read The Last Navigator about 10 years ago, I don't remember much off hand but it was very good and about this very thing.

The description from Amazon
>
> As a young man piloting a small sailboat across the Pacific, Steve Thomas developed a fascination with ancient methods of navigation. He learned of a seafaring culture which 6,000 years ago, used arcane navigation arts to guide initiates unerringly across the Pacific wih no compasses, no charts. By the time of Christ, these navigators were pushing on through all of Oceania, populating nearly a quarter of the Earth's surface. Thomas ventured to the tiny coral atolls of Micronesia in search of these mysteries, this ancient language of the sea. There he found the last navigator.
>
> Mau Piailug, one of the last surviving palu, belongs to a dying breed of navigators who used only natural signs--stars, waves, birds--to guide their sailing canoes across thousands of miles of open ocean.
>
> Thomas and Piailug voyage together on the frail ship of human memory in an attempt to preserve for future generaions an ancient, mysterious, and beautiful kinship with the sea before it is lost forever. Theirs is an unforgettable journey.
>

The Last Navigator by Steve Thomas. Tackles the pre-technology sailing systems employed by traditional pacific islanders.

Cool stuff.