Four-Eye Reef
From The Wind Waker Randomizer
Four-Eye Reef is a reef located at A2. It has an Overworld Check and a sunken treasure.
Overworld Check
A chest will spawn on one of the eyes of the reef when the player destroys all of the cannons within the reef with bombs. The chest contains a Treasure Chart in the vanilla game.
Sunken Treasure
The treasure at this reef can be located by opening Treasure Chart 41 when charts are not randomized. The chest contains the Great Fairy Chart in the vanilla game.