I think it is supposed to be random item locator 2.
When you moor at the shore, go left and the spot is the bubble area seen behind the rock, inside the pink/purple sphere you see straight ahead in this image:
If it is the Atill, that is not ERAS, but probably COAS or GOF.
yeah i get items there but not atill, just random weapons or items(i got a medium sword named commander which is insanely good), since i dont get the atill the quest is just stuck like that
actually it`s one of many immersion destroying small glitches. In another quiz the reward should be a light German sword but you get a medium Pappenheimer.