Furuno CSH-23F/24F Manuel d'utilisateur Page 66

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7-10
Comparing of Fish School Concentration
You can get an estimate of the volume of two fish schools by
using the two ESTIMATE keys.
1. Operate the trackball to place the trackball mark on a fish
school, and then press the ESTIMATE 1 key.
The estimate mark appears on the fish school. Relative vol-
ume is shown by a figure between 0 and 100, below the es-
timate mark. When inside the mark is filled with reddish
brown, volume figure is “100”.
2. Operate the trackball to place the trackball mark on another
fish school and press the ESTIMATE 2 key.
3. Compare estimate figures for each fish school.
4. To turn off the estimate marks press their respective keys.
Estimate
mark 2
Estimate
mark 2
data
Estimate
mark 1
Estimate
mark 1
data
Figure 7-8 Estimate marks and their data
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