IN-credible Chart

From Zelda Wiki.org

The IN-credible Chart is a Special Chart, available in The Wind Waker. It is given to Link by Tingle when visiting him on his island. The IN-credible Chart lists to locations of all Triforce Charts, and, once Link has obtained the Triforce Charts, the locations of the Triforce Shards.

Once a Triforce Chart or Shard has been collected, a black cross will appear on the icon for that object.

The chart is kind enough to indicate that two of the Triforce charts are hidden inside vessels such as the Ghost Ship.