There is some debris floating above it, with wooden boards and three dead Skeevers. There is a locked chest in the water beneath the hull crack which contains gold. There are two sub-locations inside the ship-the Brinehammer Below Deck and The Brinehammer Cargo Hold which is actually just an exit to Skyrim and not a real interior cell -with some chests, books and regular loot.
Exploring the ship's interior can be a little confusing due to its leaning position and tendency to rock in the waves. The wrecked ship The Brinehammer can be found along the northern coast of Skyrim, about halfway between Dawnstar and the Solitude Lighthouse.