[Crannogman]

Yes, I'm sure that the night is dark, and full of terrors (for merchantmen, at least). Having spent significant time with dark skies in both hemispheres, I can assure you that major constellations are still discernable - seeing all of both dippers in their ursine splendor is a treat. Clearly the Ancients were able to make them out. I imagine even CaptBones hisself had successfully picked out the important stuff at sea on some sort of vessel