Thebuccaneer, if you are looking for a treasure ship in Greenland? Good luck. I do not think there are any.
Also, salvor 6 is correct. There are many 1715 wrecks that have not been found. There are 2 from 1622 according to a map in the Mel Fisher museum. There are 3 from 1589 and many others lost in the last 400 years. And yes a lot of them are in shallow water.
I have a bridge for sale in NY, if you are looking for a Spanish Treasure ship in Greenland.
My bet would be that you would find more treasure ships around Cuba, then you would around Greenland and Africa.