Nautical is the first and only published expansion for Age of Empires II ECG. It is printed by Journeyman Press on 16 April 2001. and consists of 160 cards. It is available in 12-card boosters.
New civilizations are the Franks, Japanese, Saracens and Vikings. There are water rules included in the rule book, as well as a resource card that will give players an alternate way to track resources.