Well, I think it's both, and I've only been at it for a week. Places I can walk to, that sort of thing. I don't own a gps (yet, it's in the mail) but I'm fairly good with maps. For an old-timey challenge, get yourself a good (or lousy) topographic map and compass (both kinds, the magnetic and the math) and go at it without today's high-tech toys. All your gps does (if it can only talk to three satelites that is) is a simple triangulation of where you are vs. where you want to be using the satelites rather than landmarks like the old times.
I mean look at columbus... He was right where he wanted to be, if he'd hapened to be on the other side of the world . Using the maps of his day, he was pretty well on target. We have a print of an antique map on the wall(dated 1617), and while it's not totally accurate for travel today, it'll still get you in the general area.
Besides, on "pirate maps" what was "10 paces north?" Did they understand declination? How tall were Pirates anyway? What was the inseam of the man making the map??? There's lots to concider.