The coordinates for the boat are Regardless of the outcome of this fight, you can still progress the quest. Alongside the turtle beach there is another wrecked ship, with an elf fighting off a group of magisters. The first opportunity to progress the Seed of Power quest line is straight of the boat in Fort Joy.
Whilst I’m going to begin the guide for obtaining the set at Fort Joy, you can really pick it up anywhere along the way. If you’re in Arx, but want to explode stuff, fear not, because you haven’t missed out. The point I’m making about the quest line being available up until the very end of the game, is to let you know that you wont miss out on this set if you haven’t completed specific events leading up to the final chapter. This technically can be completed at any point before ‘the point of no return’ at the end of the game, but the pieces can be picked up along the way of your playthrough. The first step in becoming a master-exploder is finishing the Seed of Power quest-line so that you can obtain the Contamination Armour Set.