The first stage takes you to a parking lot. Nearby there is a high place with religious significance, with 2 archaic but deadly weapons in front. Go stand between these 2 weapons, poised to defend the bay from intruders by sea. From this spot, use your GPS to take a bearing of 198°, and take a range of 441 metres. You could walk to the location of the final cache, but driving might be easier. Hope your aim is keen!