Quote Originally Posted by sydneyf View Post
how do i unlock sea of jade? i have been sending my subs to sunken vault and no luck
The sector order to unlock Sea of Jade starting from Sunken Vault:

Sunken Vault >> South Isle of Zozonan (Sea of Ash).
South Isle of Zozonan >> Wreckage of the Windwalker
Wreckage of the Windwalker >> North Isle of Zozonan
North Isle of Zozonan >> Sea of Ash 2
Sea of Ash 2 >> Sea of Ash 3
Sea of Ash 3 >> Ascetic's Demise
Ascetic's Demise >> Sea of Ash 4
Sea of Ash 4 >> The Midden Pit
The Midden Pit >> The Open Robe
The Open Robe >> The Slipped Anchor
The Slipped Anchor >> Isle of Sacrament (Sea of Jade)

There are additional sectors that may be unlocked along the way but they won't help to unlock Sea of Jade.