Boardgamegeek https://boardgamegeek.com/boardgameexpansion/4103/catan-seafarers-5-6-player-extension
English - Now five to six players can sail into the uncharted and explore and settle the mysterious islands near Catan! The 5-6 Player Expansion for The Seafarers of Catan allows you to add 1-2 more opponents without sacrificing ease of play.