The sea, poetically known as the whale-road and Neorthe’s roof, has long fascinated men. An invisible network of trade routes weave across its turbulent surface, carrying men and cargoes from port to port, yet it is a realm more dangerous than any other. Ships face attack by terrible beasts and marauding pirates, orc galleys prowl in search of fresh victims, storms batter at fragile vessels and submerged rocks threaten to tear hulls to kindling.

This supplement takes a look at some of the treacherous waters around Rassilon, delves deeper into the cult of Neorthe, god of the sea, explores nautical travel and underwater combat, details two new gods, Carcharas, the shark god, and Vegtam, minor god of mariners and marines, and presents new aquatic and nautical hazards and creatures.