SUUNTO PM5 - Manual (Page 15)

14
Calculate:
Take 52 per cent of 25 m / 82 ft. This is 13 m / 42.6 ft. Multiply this by the cosine of
9 degrees.
0.987 x 13 m = 12.8 m or equally in feet 0.987 x 42.6 ft. = 42 ft.
Method 2. Multiply the ground distance by the slope angle cosine.
0.987 x 25 m = 24.6 m or equally in feet 0.987 x 82 ft. = 80.9 ft.
Add percentage readings as above and take the sum percentage of the corrected
distance.
or equally in feet
This example shows that a slope angle of 9 degrees causes a correction of only
2.3 per cent but when the slope angle is 35 degrees the correction means a reduction
of about 18 per cent in the observed height.
23
100
---------
29
100
---------
52
100
--------- = +
52
100
--------- 24 6m 12 8m , = ,
×
52
100
--------- 80 9ft 42ft = ,
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