Furuno 585 - Manual (Page 20)

1. OPERATION
11
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 Level or Depth and
press the ENTER key.
Level and Depth fish symbols
Note: When selecting Off on Fish Symbols
menu, only level or depth is displayed.
5. Press the MENU/ESC key twice to close the
window.
Principle of fish level
Returning echoes at the center of the trans-
ducer beam are used in fish level calculation.
Fish for level calculation are taken from the 200
kHz beam and their level 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 level calculation.
Principle
Consideration for fish information
• The 600 W transducers which offer level
calculation 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 level. 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 level differs between the indi-
cated value and the fish caught, you can
compensate it on the Calib menu (see sec-
tion 2.6).
• When Fish Symbols or Fish Info are
enabled, 50 kHz and 200 kHz beams are
transmitted alternately even if a single fre-
quency mode is in use.
• To reduce error the detection area should
be 2 to 100 meters from the surface.
• With the inside-hull transducer, signal
attenuation is different between 50 kHz and
200 kHz. Therefore, a fish may not be
detected or the fish level indicated may be
smaller than actual level.
• In case of a fish school, echoes overlap one
another, so the margin of error will be
greater.
1.16 Alarms
The FCV-620/585 have six conditions which
generate both audio and visual alarms: bottom
alarm, normal fish alarm, bottom lock fish alarm,
water temperature alarm, speed alarm and
arrival alarm. (The water temperature, speed
and arrival alarms require appropriate sensors.)
To silence the buzzer press any key.
Bottom alarm: The bottom alarm alerts you
when the bottom displayed in red or reddish
brown echo is within the alarm range set. To
activate the bottom alarm the depth must be dis-
played.
Fish (normal) alarm: The fish (normal) alarm
tells you when an echo above a certain strength
(selectable) are within the preset alarm range.
See page 13 for alarm level setting.
Fish (bottom lock) alarm: The fish (bottom
lock) alarm sounds when fish are within a cer-
tain distance from the bottom. Note that the
bottom lock display must be turned on to use
this alarm.
Off
Level
Depth
15
60 60
15
Solid
(Small
fish symbol)
Solid
(Large
fish symbol)
Striped
(Small
fish symbol)
Striped
(Large
fish symbol)
Level or depth is displayed in red.
50 kHz
200 kHz