1. OPERATION
1-24
1.16 Displaying history
You can scroll the screen to see the past fish finder displays (3 screens). This function
is called ‘‘scroll back mode’’. This is a convenient function when you want to see the
previous fish finder displays.
Note 1: This operation cannot be used when Nav data window is displayed.
Note 2: The display freezes during scroll-back mode. Do not use during normal navi-
gation.
1. To switch into scroll-back mode, press . The icon below appears on the top of
the screen.
2. Press or to check the display. Pressing scrolls the display toward the past.
Conversely, press to scroll display to the current time.Pressing the button
scrolls the image toward the current time.
3. Press MENU/ESC key to deactivate the scroll-back mode.
1.17 Fish Information (ACCU-FISH
™
)
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 required.
*: See page AP-5 ‘’Transducer List’’ for further information.
Considerations for ACCU-FISH
TM
• The size values for individual fish are for reference purposes only and do not indi-
cate the exact size of the fish.
• Echo intensity depends on fish species. When the fish length differs between the
indicated length and the actual length, you can compensate the difference (see
page 2-7).
• High and low frequencies are alternately transmitted when ACCU-FISH
™
is active,
regardless of mode selection.
• A fish whose depth is shallower than 2 m* or greater than 100 m cannot be mea-
sured.
*: Even when the zero line rejection function is used, single fish are not detected
even in areas within the adjustment range (see page 2-7).
• This feature cannot be used with the inside-hull transducer since a fish may not be
detected depending on the transducer's frequency. Even if a fish is detected, the
fish length indicated may be smaller than actual length.
• In a school of fish echoes overlap one another, so the margin of error will be greater.
• The bottom echo must be present to show the fish mark.
• The TX pulse length changes according to ACCU-FISH
™
On/Off state. This caus-
es a difference in both sensitivity and the echoes viewed.
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