Suunto PM5 Instrukcja Użytkownika Pobierz pdf (Strona 6)

5

MEASUREMENT OF HEIGHT

The actual measurement of the height

of the tree should be done from the

distance measured in the following

way: the observer sights the top of the

tree with both eyes open. The object

sighted, the hair line and the scale will

all be simultaneously visible in the

instrument`s field of vision. As soon

as the hairline coincides with the top

of the tree, the tree height can be read

off (in this example, from the 20 m

scale on the left of the instrument).

The reading obtained is the height of

the tree measured from the eye level

of the observer. The base of the tree

remains to be sighted. If this is

situated below the eye level of the

observer, then the actual height of the

tree is obtained by adding the two

readings together. If it is above the

observer`s eye level, the tree height is

obtained by taking the difference

between the two readings. In fact, in

the latter case the distance cannot be

measured horizontally. Thus, to get

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