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
