I have been known to head out in the dark but only when I know where I'm going & not crossing large bodies of water.
I carry a compass at all times (try being on the flats, in the fog with a flooding tide without one) but do not have one mounted on my deck.
I am also looking for a water proof ( or are they just "water resistant"?) GPS that is easy enough for a child to use.
What works for the forum yakkers? Any links?