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NAVIGATION TIPS
George G. Spearing
Hiking, and in particular hiking in remote areas, is a
great experience if approached with due regard for fitness, safety and skill. One of the major skill categories, is the ability to
navigate with or without compass and map. Ideally, no one should head off the
beaten track without map or compass, but what if you find yourself in that
situation, or you lose or damage your compass?
Here are a few basic ‘skills’ that could one day be of use
to you.
Finding direction by using your watch...
If you have a watch that is working correctly, you can
always quickly determine the points of the compass as long as the position of
the sun is visible.
The method used varies depending upon which hemisphere
(northern or southern) that you happen to be living in. The following methods
are described using an analog watch, (that’s a watch with an hour and a minute
hand) but they can be applied just as well if you own a digital watch – just
use your imagination to superimpose the 12 hourly numerals and the relevant
position of the ‘hour hand’ on the face of your digital watch.
Northern Hemisphere
Holding your watch horizontally, point the ‘hour
hand’ of your watch at the sun.
Note the direction that lies exactly midway between the
‘hour hand’ and the numeral twelve on your watch. This will be South.
Once you have established this, it will be easy to
determine the other points of the compass.
Southern Hemisphere
Holding your watch horizontally, point the numeral twelve
on your watch at the sun.
Note the direction that lies exactly midway between the
twelve and the ‘hour hand’.
This will be North.
These methods will give you a good approximation of compass
direction.
If your watch happens to be adjusted for daylight saving at
the time, then ‘remove’ the daylight saving for greater accuracy.
Another method of determining compass points can be used if
you do not have a watch. This method takes longer and also requires enough
sunlight to cast a shadow...
To find North without a watch
Before noon, on level terrain, position a stick of about
3ft upright into the ground.
Mark the tip of its shadow with a peg or stone.
Using the tip of the shadow as a radius, draw an arc around the stick.
The shadow will shorten as it approaches noon, pulling back from the arc. It
will then lengthen again - where the afternoon shadow once again touches the
arc, place another peg or stone.
Now draw a straight line between the two pegs/stones - this will be an East/West
line, with the first peg being in the westerly direction.
You can now draw a North/South line at right angles to the East/West line.
The following (less accurate) method can also be used at any time of the day
without drawing an arc...
Peg the tip of the first shadow, then about 20min later peg
the tip of the moved shadow. Draw a straight line between the two pegs, and this
will be an approximately East/West line, with the first peg again being the
westerly one.
A typical error when lost, is a tendency to wander off what
you may think is a straight line bearing, sometimes even slowly circling back on
yourself.
To prevent this, note an object (tree, rock, terrain
feature) that lies directly ahead of you in the direction you wish to travel,
then aim for it. When you reach it, take another bearing on the direction you
wish to head, sight another object directly ahead of you and repeat the process.
In areas of restricted distance visibility, you may have to
repeat this quite often over short ‘legs’ to ensure that you are remaining on
course.
Keeping a course by the clouds...
What if it's a cloudy day with no sun visible to get a
bearing on, or the bush canopy prevents you getting a clear "shot" at the sun?
Well, if you're lucky, it may be windy with the clouds
moving in a constant direction - note the directional flow of the clouds, and
adjust your course relevant to their direction. e.g., If the clouds are moving from your front from right
to left over your shoulders, keep them there, at the same time, sight an object
straight ahead of you and head for it.
To retrace your steps in the same general direction, just
do an about turn, then keep the clouds moving from behind and now left to right
over your shoulders, and repeat the process.
Being aware of your surroundings will often pay off, so try
to cultivate that habit.
Telling the time without a watch...
Determine North, South, East and West using the method
previously described.
Position your stick at the intersection point of your
East/West, North/South lines.
The Eastern point of the arc around the stick will be
1800hrs, the Western point will be 0600hrs, whilst the Northern or Southern
(depending on which hemisphere you're in) midpoint of the arc will be 1200hrs.
The approximate time of day can then be read off the arc
using the moving shadow.
George Spearing is the author of,
“Dances With Marmots – A Pacific Crest Trail Adventure”
ISBN:1411656180
http://www.danceswithmarmots.com
Outdoor experiences include a thru-hike of the Pacific
Crest Trail and thru-hikes of Great Britain, and the North Island of New
Zealand.
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