Instructions
Obtain the Ghost Ship Chart item on Diamond Steppe Island. Locate Diamond Steppe Island on your in-game map. Go to the island and clear all areas of enemies. Find the chart at the center of the maze inside the island's cavern.
Go to the Ghost Ship. Because Link now has the Ghost Ship chart, the location of the actual ship will be marked on the in-game map. You can now enter the Ghost Ship thanks to the chart, which would not have been possible before.
Clear the Ghost Ship of all enemies. Use your sword, boomerang, bow and arrow and other items in your inventory to kill all the enemies in this area. When all enemies are destroyed, Link will earn with the 4th Triforce chart, which shows the location of the 4th shard of the Triforce.
Open the Triforce chart from your item inventory to view the location of the 4th shard. Return to Outset Island, the first area of the game, and search the eastern border to find the 4th shard.