How To Compare Concentration Of School Of Fish; How To Compare With The Fish Estimate Mark; How To Compare With The Circle Cursor - Furuno FSV-85 MARK-2 Operator's Manual

4.16 How to Compare Concentration of School of
Fish
4.16.1

How to compare with the fish estimate mark

You can get an estimate of the volume of two schools of fish by using the two ESTI-
MATE keys as follows:
1. Operate the trackball to place the cursor on a school of fish, and 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.
2. Operate the trackball to place the cursor on a 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.
4.16.2

How to compare with the circle cursor

You can get an estimate of the volume of two schools of fish with the diameter of the
school of fish as follows:
1. Push the scrollwheel to show the circle cursor.
The cross cursor changes to the circle cursor (dotted line).
2. Place the circle cursor on the school of fish.
1 1
E Estimate mark 1
N North mark
R Relative fish volume
25 25
83m
2 2
1
me
65 65
Diameter of the circle cursor
4. SLANT MODE
Estimate mark 2
4-23