Ok, here's a little info. This is a page of the roadbook from the Rally Mongolia. Funny as it's written in English by Japanese organizers. There were a few funny translations such as warnings for "clacks" meaning "cracks" which were actually washouts. You learn to understand the lexicon for what it is despite language. You can see the ICO on top left which is your adjustable ODO that you have to keep in sync with your roadbook. The GPS is only for CAP heading which is your compass direction as you can see on the roadbook. If you get lost you have to go back to your last known location and reset the ODO to match the roadbook. I could navigate ok up to about 80 kmh but faster than that I was making mistakes and getting off track. The competence of the pros running over 100 MPH and navigating is insane. The roadbooks this year are far more complex with crap in there.
What you saw of folks getting lost was a dodgy tulip, (the middle symbol on the roadbook), in the roadbook that had them lost looking for a waypoint. Most of them wasted time looking for it while a few sensible ones skipped it and took the 10 min penalty instead of wandering for an hour. There is a very high level of strategy played at the pointy end of this game.
I for one am following every day and I have just started getting up at 02:00 to follow in real time. As I said the ADV thread is the #1 place to see what's up in real time but the focus is mostly bikes. My friend Teruhito Sugawara is the factory Hino driver and this year they have a brand new hybrid truck with 1000HP of combined power. Pretty incredible stuff to watch if you like that kind of thing. This year for the first time there are 4 or 5 Americans in the top 10 if any of you care.