21
Measuring altitude
Measuring altitude
Continued on the next page
2.5 m hand indication
Indication range: ‒97.5 m to 97.5 m
The 100 m hand points minus indication when measured altitude is lower than 0 m.
In this case, use figures in parentheses to read the 2.5 m hand.
On the example in the right, the last 2 digits of measured altitude are indicated as “40
m” or “‒60 m”.
• Measured altitude is indicated in 5.0-m
height when it is more than 6 000 m.
• When your watch has the scale, setting the
mark on the scale to the position that
the 2.5 m hand points makes it easier to
determine altitude difference at the next
altitude measurement.
+
-
m
0
200
800
400
600
0
1
2
3
4
5
6 7 8 9
x 1000 m
+
-
m
0
200
800
400
600
0
1
2
3
4
5
6 7 8 9
x 1000 m
+
-
m
0
200
800
400
600
0
1
2
3
4
5
6 7 8 9
x 1000 m
10
10
10
W
E
m
(-10)
(-20)
(-30)
(-40)
(-50)
(-60)
(-70)
(-80)
(-90)
0
50
90
40
80
30
70
20
60
10
10
(-9
0)
(+
50
)
S
(-5
0)
m
W
E
60
(-
40
)
7
0
(-
3
0
)
8
0
(-
2
0)
90
(-1
0)
2
0
(-
8
0
)
3
0
(-7
0)
40
(-6
0)
W
E
m
(-10)
(-20)
(-30)
(-40)
(-50)
(-60)
(-70)
(-80)
(-90)
0
50
90
40
80
30
70
20
60
10
10
(-9
0)
(+
50
)
S
(-5
0)
m
W
E
60
(-
40
)
7
0
(-
3
0
)
8
0
(-
2
0)
90
(-1
0)
2
0
(-
8
0
)
3
0
(-7
0)
40
(-6
0)
W
E
m
(-10)
(-20)
(-30)
(-40)
(-50)
(-60)
(-70)
(-80)
(-90)
0
50
90
40
80
30
70
20
60
10
10
(-9
0)
(+
50
)
S
(-5
0)
m
W
E
60
(-
40
)
7
0
(-
3
0
)
8
0
(-
2
0)
90
(-1
0)
2
0
(-
8
0
)
3
0
(-7
0)
40
(-6
0)
