Furuno FCV-588, Operator'S Manual

Page: 18 / 80

1. OPERATION
11
4. Press the MENU/ESC key twice to close
the window.
Directional angle display
With the transducer selected for other than
600 W or 1kW (FCV-588 only), directional an-
gle range line, direction angle, directional ra-
dius, directional radius value and directional
radius line appear on the A-scope display.
The directional angle display provides an at-
a-glance view of the available detection
range. In the example below an echo from a
school of fish is at the depth of 20 m. and with-
in 8. 5 m radius of the center of the transducer
beam.
Note: The directional angle range lines repre-
sent the transducer beamwidth. They are not
an indication of echo strength.
1.15 Fish Information
(ACCU-FISH
TM
)
The ACCU-FISH
TM
feature measures the
length of individual fish and tags the fish with
a fish symbol whose size is proportional to the
length of the fish. The length or depth of the
fish can be indicated digitally. Connection to a
transducer that supports ACCU-FISH
TM
is re-
quired.
Note: The fish length calculated by this fish
finder is intended for reference purposes; it is
not a completely accurate measurement of
fish length.
Considerations for ACCU-FISH
TM
• The following transducers support ACCU-
FISH
TM
:
• Echo intensity depends on fish species.
When the fish length differs between the in-
dicated length and the actual length, you
can compensate the difference on the
[Calib] menu (see section 2.6).
• ACCU-FISH
TM
is inoperative when the
zero line rejector is active.
• High and low frequencies are alternately
transmitted when ACCU-FISH
TM
is active,
regardless of mode selection.
• A fish whose depth is shallower than 2 m or
greater than 100 m cannot be measured.
• If the transducer is installed inside the hull,
the signal is attenuated by the hull. There-
fore, a fish may not be detected or the fish
length indicated may be shorter than actual
length.
• In a school of fish, echoes overlap one an-
other, so the margin of error will be greater.
• The bottom echo must be present to show
the fish symbols.
Weak reflection
(small school of
fish or noise)
Past amplitude
pictures are
displayed with
dots in [Peak]
mode.
A-scope
display
Reflection
from school
of fish
Single freq.
display
Strong
reflection
(bottom)
AUTO_R G:AF AUTO_R G:AF
LF LF x1 x1
59.8
m
59.8
m
0.0 0.0
8.5
25.5 25.5
0
20
40
60
80
0
20
40
60
80
Directional
angle radius
Directional
angle radius
line
Directional
angle range
line
School of
fish
LF LF x1 x1
0.0 0.0
8.5
25.5 25.5
0
20
40
60
80
0
20
40
60
80
Transducer (option)
600 W 520-5PSD, 520-5MSD, 520-PLD,
525-5PWD, 525T-PWD, 525T-BSD,
525T-LTD/12, 525T-LTD/20,
525STID-MSD, 525STID-PWD,
SS60-SLTD/12, SS60-SLTD/20
1 kW 50/200-1T, 526TID-HDD