In Phantom Seas, you want to claim as much treasure as possible without having it stripped away from you by the phantom ship that patrols the waters. To set up, place the 22 treasure tiles face down at random on the designated spaces on the game board. These tiles are worth 1-3 points as indicated by the number of locks on them. Place the included compass on the game board, and orient the board so that the compass points north. Place your ship on one of the starting locations and the phantom ship in the center of the 13x13 game board. At the start of each round, reveal seven direction cards from the top of the deck. Players then take turns choosing a card and moving their ship in the indicated direction and distance, with most cards giving you choices for one or both of these values. If you finish your movement on a treasure tile, flip it over to see whether the phantom ship moves; if it does, the phantom ship moves directly toward you, and if it reaches you before ending its movement, then you throw that treasure away instead of keeping it. Some tiles have you rotate the game board (and the compass), which means that the direction cards will now have you moving in different ways. After all the cards have been played, reveal seven new cards from the deck. After seven rounds or after all treasures have been claimed, players count their scores to see who wins.