Silva ALPHA 4 Bedienungsanleitung PDF herunterladen (Seite 40)

NAVIGATION

Understanding Map Features

Being able to envision the terrain depicted

on a topographic map is key to both plan-

ning and travel. Contour lines represent

the topography or “vertical” shape of the

landscape, helping identify features like

mountains, valleys and ridges; the closer

the lines, the steeper the slope. Topo-

graphic maps are also colour-coded: blue

for water; white for open terrain, green for

forest; black for roads, paths, buildings

and other man-made objects.

Navigating Safely

Both when planning and traveling, use

significant terrain objects to mark your

route. Examples include rivers and lakes,

hills, fields, paths, roads and power lines.

By holding onto this visual “hand-rail” you

travel faster and more safely, reducing the

number of possible route-finding errors.

Understanding Scales / Distances

A map is a scaled down model of reality,

so it’s important to understand how it rep-

resents distance. Using the map’s scale,

you can measure distance with the com-

pass base plate. If your compass lacks

the corresponding scale, use the regular

metric ruler and this simple rule: drop the

last three digits from the scale and this is

the number of metres on the ground rep-

resented by 1mm on the map; e.g, on a

1:50.000 map, 1mm represents 50 metres.

(NOTE: special map measurers also work

with most map scales to make distance

measurement easy.)

Hints & Tips

FIELD

Art. No. 36989-9001

Art. No. 36989-9003 (ME)

Art. No. 36989-9005 (MS)

The original Silva Field has base plate map-measuring

in mm and scales of 1:50,000 and 1:25,000 compatible

with most maps. The compass features DryFlex™ rubber

bezel for improved comfort and grip, and a detachable

safety-release lanyard—a reliable companion in all

situations!

Silva WB 2012.indb 40 2011-09-19 15:28

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