The Barrel Shoot is a mini-game from The Legend of Zelda: The Wind Waker. Located on Spectacle Island, it is operated by Salvatore, who also runs the Sinking Ships mini-game on Windfall Island. The object of the game is to hit a series of floating targets in the Great Sea by using a cannon. The game costs 50 Rupees to play, but includes prizes such as a Piece of Heart, a Treasure Chart, and 100 Rupees. While Link is playing the game, Salvatore uses cardboard cutouts resembling Tetra and her pirates (mainly Gonzo for the instructions) for amusement.
Interestingly, barrels will always be placed within 5 degree intervals. Thus, they can appear at only 15, 20, 25, 30, 35, 40, 45, and 50 degrees and never in between these distances. With this knowledge, aiming for the barrels is made slightly easier.