Furuno FCV-620 - Manual (Page 20)

1. OPERATION
11
1.15 Fish Information
You can turn the fish symbol indication (Solid or
Striped) on or off. Also, you can show or hide
the fish size and the depth value. For details
about the Fish Symbols, see the information
which follows the procedures in this section.
Note: The fish size found by this sounder is
intended for reference purposes; it is not an
accurate measurement of fish length.
Fish Symbols
1. Press the MENU/ESC key to open the menu.
2. Use
S or T to choose Display and press the
ENTER key.
3. Use S or T to choose Fish Symbols and
press the ENTER key.
Fish Symbols setting box
4. Use S or T to choose Off, Solid or Striped
as appropriate and press the ENTER key.
The symbol size depends on the fish size.
Note: To hide the fish symbol, choose Off at
step 4 and press the ENTER key.
5. Press the MENU/ESC key twice to close the
window.
Fish Info
1. Press the MENU/ESC key to open the menu.
2. Use
S or T to choose Display and press the
ENTER key.
3. Use S or T to choose Fish Info and press
the ENTER key.
Fish Info setting box
4. Use S or T to choose Off, Fish Size or
Depth as appropriate and press the ENTER
key.
Fish symbols with fish info figure
Note: You can show the fish info figure alone
(without fish symbol) by turning off Fish Sym-
bols on the Display menu.
5. Press the MENU/ESC key twice to close the
window.
Principle of fish size
Returning echoes at the center of the trans-
ducer beam are used in fish size calculation.
Fish for size calculation are taken from the 200
kHz beam and their size is calculated from their
strengh found with the 50 kHz beam. In the
example below, only the fish at the center of the
figure is used for size calculation.
Principle
Consideration for fish information
• The 600 W transducers which offer size cal-
culation are 520-5PSD, 520-5MSD, 525-
5PWD, 525ST-MSD and 525ST-PWD.
• For 1 kW transducer, the integrated type
50/200-1T is recommended to display the
fish symbol and the fish size. When using
both 50B-6 and 200B-5S, they should be
installed in close proximity to each other.
• Echo intensity depends on fish specie.
When the fish size differs between the indi-
cated value and the fish caught, you can
compensate it on the Calib menu (see sec-
tion 2.6).
Fish size Solid Striped
Large fish symbol
(more than 50 cm, or
more than 20 inches)
Small fish symbol
(10 to 49 cm, or
4 to 19 inches)
Off
Solid
Striped
Off
Fish Size
Depth
15
60 60
15
Solid
(Small
fish symbol)
Solid
(Large
fish symbol)
Striped
(Small
fish symbol)
Striped
(Large
fish symbol)
Fish size or depth is displayed in red.
50 kHz
200 kHz