Fish Information (Accu-Fish ™ ) - Furuno FCV-1900 Operator's Manual

1.22 Fish Information (ACCU-FISH
The ACCU-FISH
a fish symbol whose size is proportional to the length of the fish. The length or depth
of the fish can be indicated digitally.
Notice for the ACCU-FISH
• This feature requires an appropriate transducer. For the transducer compatible with
this feature, see "EQUIPMENT LISTS" on the installation manual (IME-23860).
• For FCV-1900G, close the fish size histogram window to use the ACCU-FISH
• The fish length calculated by this fish finder is intended for reference purposes; it is
not a completely accurate measurement of fish length.
• The echo strength of a school of fish changes according to the fish. When the size
shown on the fish size histogram differs from the actual size, adjust [Fish Size] on
the [Calib] menu to compensate for the difference (see page 2-7).
• A fish whose depth is shallower than 2 m can not be measured. Also, the maximum
range depends on the transducer's performance, installation location, and seastate.
If the [Zero Line Rejection] on the [Calib] menu is turned on, the fish whose depth
is shallower than the transmission line can not be measured.
• With the inside-hull transducer, signal attenuation changes according to the trans-
ducer's frequency. Therefore, a fish may not be detected or the fish length indicated
may be smaller than actual length.
• In case of a school of fish, echoes overlap one another, so the margin of error will
be greater.
• The TX pulse length changes according to ACCU-FISH
a difference in both sensitivity and the echoes viewed.
1 1 1 0/99
x x x
0.0 0.0
HF: 2.0
Weak reflection
(small fish or noise)
Fish echo
Strong reflection
(bottom)
59.8 59.8
m m
Single frequency display
™
feature measures the length of individual fish and tags the fish with
feature
TM
VRM 0.0
0 0
20 20
40 40
60 60
80 80
A-scope display
™
)
™
On/Off state. This causes
1. OPERATION
™
.
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