The sea is full of sunken treasure and all it needs is for you to find it and bring it to the surface. How are you are deep sea salvage? Do you get sea sick? No such problems here. Just get your device and start grabbing treasure from the deep.
As a treasure miner only go after the treasure, not the fish. After all treasure is much more valuable. All you have to do is let down your hook and wind up what you catch.