Navigation in Arid Regions and Dune Fields
Navigation in deserts and dune fields can be a problem because the extensive gently
undulating sand sheets with their isolated patches of large dunes present a vista somewhat
like that of the open ocean.
The horizon is featureless, and there are few landmarks to steer by – no mountains in the
distant – no easily recognized water courses – no trees – only scattered bedrock nubbins
and isolated small vegetation mounds that can be tens of kilometers apart.
A dead reckoning plot (compass and odometer) must be kept for all traverses as a backup
for any electronic locating devices being used.
All of the techniques of coastal piloting become applicable with the few reliable scattered
landmarks serving as navigational aids.
Landsat TM imagery co-registered with whatever topographic data are available, is
probably the best overall type of chart for use in these areas.
Navigation Aids:
Inselbergs – show on maps, radar, and satellite images
Vegetation mounds – larger ones show on maps, radar, and satellite images
Ventifacts – prevailing wind direction