Ultimate Navigation Manual by Lyle Brotherton

Ultimate Navigation Manual by Lyle Brotherton

Author:Lyle Brotherton [Brotherton, Lyle]
Language: eng
Format: epub
Publisher: HarperCollins Publishers
Published: 2011-09-14T22:00:00+00:00


2 Desert trips can often be for extended periods of time and small solar battery-charging units should be used with rechargeable batteries.

3 Handheld satnavs should not be exposed to direct sunlight in extreme temperatures for long periods of time, so the use of an external antenna should be considered.

4 Familiarise yourself with the use of the latitude and longitude coordinate system.

Specialist techniques

Route planning

Locate and mark refuges and water holes on your map and store them as waypoints in your satnav; a longer route that passes near to these can be much safer than the direct route across the middle of the desert. Familiarise yourself with the climatic changes in the region and local land phenomena: for example, some deserts have arroyos, also called a wash, which temporarily fill with water after either heavy rain or seasonally and can be tens of kilometres across. Make sure that you share the route with every member of the expedition, even if using a local guide, as in an accident, you must be able to describe exactly where you are and also how to escape.

Dead reckoning

Probably the single most important technique employed in desert navigation. Draw up a log of each leg length, bearing and time taken.

Transit lines

After taking a bearing on a distant feature, line it up with an intermediate feature both to use as an Attack Point and as a Transit Line to ensure a straight bearing is followed.

Markers

• Use your tracks created in the sand.



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