Now, we have to find the invisible ship with the flame. Nayru’s flame is inside the ship, so you can dowse for it.
The problem is that, when you dowse, you’ll be unable to use the cannon, so attack only when the signal is very strong.
Above is the path that the Sandship takes–it does a loop around the north-east ring. From our experience, the ship travels anti-clockwise, but it can reverse direction if you move in front of it (the ship may be invisible, but it can still see you!).
Hit the ship three times to make it appear. After a short scene, you’ll automatically climb to your next dungeon, the Sandship.