Triforce Charts

From Zelda Wiki.org

Near the end of The Wind Waker the King of Red Lions informs Link that to return to Hyrule he must find the eight Triforce Shards to reform the Triforce of Courage. However, he could not find them without the help of the Triforce Charts. When Link found them, he couldn't read them, so he had to take them to Tingle Island and have Tingle decipher them. The location of the Triforce Shards was then shown on the IN-credible Chart.