Considering I am fully dressed with trousers, shoes, shirt) I would take from the plane:
1. flashlight/torch - to travel during the night
2. one/two big bottles of water
3. a scarf/towel/cloth to cover my mouth and head
4. a long stick - to check quicksands, snakes, spiders
5. compass - to keep direction;
6. umbrella - to keep shade during the day;
7. a thick/warm coat/jumper (nights are quit chilly in the desert);
8. hat - in daytime the temperature is very hot and the head must be covered
9. a large plastic bag
10. matches