Superior casket-salvaging scrimshaw

The superior casket-salvaging scrimshaw is an item that can be made with the Fletching skill at level 90 once all four scroll fragments of casket-salvaging have been retrieved from the Player-owned port, using 10 ancient bones.

When equipped, it offers a chance at finding an oak casket, teak casket, or mahogany casket while fishing. This casket will contain a random reward, including gems, divine locations and port resources.