There was a part in Kon-Tiki where Heyerdahl says that after a month or so out in the ocean, they realized that it was easy to navigate between islands. First

There was a part in Kon-Tiki where Heyerdahl says that after a month or so out in the ocean, they realized that it was easy to navigate between islands. First sail north or south to the latitude of your destination. Then sail east or west, maintaining the latitude to the destination. If you were confident about your position and heading, you could mix N/S and E/W motion to get there faster.