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2.17
How to Compare Concentration of School of
Fish
2.17.1
How to compare with the fish estimate mark
You can use the two ESTIMATE keys to get an estimate of the volume of two schools
of fish.
This function requires appropriate data input. For details, see "DATA INPUT
REQUIREMENTS" on page AP-12.
1. Place the cursor on a school of fish, then press the ESTIMATE 1 key.
The estimate mark appears on the school of fish. Relative volume is shown by a
figure between 0 and 100, below the estimate mark. When the area inside the
mark is filled in reddish brown, volume figure is said to be 100. When the estimate
mark is entered, a graph is shown at the histogram on the numeric/graphic data
display. For the histogram, see page 2-30.
2. Place the cursor on the second school of fish, and then press the ESTIMATE 2
key.
Compare estimate figures for each school of fish by observing estimate mark data
and the fish histogram.
3. To turn off the estimate marks press their respective keys.
Note: The fish school mark and event mark 1 can be entered with the fish estimate
mark. For details, contact your dealer.
1
1
E
Estimate mark 1
N
North mark
R
Relative fish volume
2
2
25
25
2
2
1
1
1
me
65
65
2. SLANT MODE
Estimate mark 2
2-29
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