I’ve been reading about Polynesian navigation using star houses and constellations, but I can’t imagine the sun really gives the same precise kind of information. How did they manage this while sailing during the day?
Stars not there? Read the sea, read the skies. More can always be said on the matter if anyone would like to speak of Oceania's wonders; for the meantime, OP, I shall take this opportunity to link you to one of my personal favourite answers on this sub, on grounds of, A, it's awesome, and B, it covers your question precisely. Behold, u/b1uepenguin covering Polynesian methods of navigation.