From Teuber's official website:'On your turn place an explorer ship on a circle field on one of the three sides of the game board and draw a sea tile. Place the tile if it fits, i.e. when water borders water and land borders land. Throughout game-play a fascinating seascape unfolds before your eyes. The size and arrangement of the islands on the board is different in each game!'Online Play PlayCatan (real-time) BoardGameGeek Info