Polynesians watched the waves, whose direction and type relinquished useful navigational secrets.
The Polynesian reproduced their wave experiences in a certain kind of map: the stick-charts, see
Embassy of the Marshal Islands
Those marine maps are compared with the web of modern organisation software:
Here an exact explanation by Dirk H.R. Spennemann how a stick chart functions:
A further article about Polynesian navigation:
Ethnomathematics treats Polynesian navigation, too: