The map that only works after sunset

I'm flying an old C-130 at night with no GPS, following a river that isn't on any chart I've ever seen. The water glows faintly, like it's reflecting a moon that hasn't risen yet. Every time I check the instruments they show something different — sometimes a heading, sometimes a recipe for bread, sometimes a list of names I almost recognize. I keep thinking I should be worried, but in the dream I just follow the river and trust it.