One of the problems with deserts are sandstorms!
Here we are in Morocco, 2011, just regrouping after becoming separated in a sandstorm.
Visibility was down to just a couple of yards at its worst - two of our group got stuck in soft sand when they stopped and disappeared - the tracks made by our tyres were disappearing within seconds so no chance of anyone following finding our tracks.
Luckily we had a guide with us who wrapped his black Tuareg around his head and face, and set of like a ninja into the sandstorm, appearing 15 minutes later with the stragglers. How he found them we don't know, but we all regrouped in the shelter of a small dune and settled down for the night.
Here we are the next morning, just a couple of hundred metres from the big dunes we had been heading for, but couldn't see!
And a couple of hours later in front of the dune:
Cheers,
Robin.