Dead Man's Chest (2005)

A Treasury of Nautical Lore
No place offers more adventure than the ocean. No dungeon is as deep, no jungle as full of an exotic and dangerous life. Most folks spend their entire lives on dry ground, unaware that entire civilizations thrive beneath the waves, sometimes far more ancient and steeped in mystery than any on the world's upper surface. Though player characters (PCs) have long grown familiar with the air-breathing world above, seldom do they venture into the depths, and when they do, they discover wonders they never dreamed existed. The ocean offers a venue for an adventure that is at once alien and appealing. Strange things exist down there, as perilous as they are compelling.

Maritime Adventures
Dead Man's Chest lays bare the ocean and the creatures that inhabit it. Within these pages are detailed rules for ship movement, as well as guidelines for underwater exploration, and three complete maritime adventures. At last, there is a comprehensive source for sailing and the sea-packed with over 100 new magic items, monsters, feats, prestige classes, and spells.