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Table 1-1 Default ranges
Basic Range
Unit
1 2 3 4 5 6 7 8
meters 5 10 20 40 80 150 200 300
feet 15 30 60 120 200 400 600 1000
fathoms 3 5 10 20 40 80 120 200
P/B 3 5 10 30 50 100 150 200
1. Press the [+] or [-] key of the [RANGE]
key and the display should now look
something like the one below.
2. Press the [+] or [-] key of the [RANGE]
key again to choose a basic range.
1000ft
600ft
400ft
200ft
120ft
60ft
30ft
15ft
Basic ranges (default)
Shifting the range
The basic range may be shifted up or down
in the manual mode as follows:
1. Press the [MENU/ESC] key to open the
menu.
2. Choose SHIFT from page 1 of the
menu.
3. Press ► to open the shift options
window.
0ft
Shift window
4. Use ▲ or ▼ to choose amount of shift
desired.
5. Press the [MENU/ESC] key to close the
menu.
Note: The picture may not be displayed if
the amount of shift is greater than actual
depth.
Adjusting the gain
The [GAIN] key adjusts the sensitivity of the
receiver. Generally, use a higher gain
setting for greater depths and a lower
setting for shallower waters.
Gain too high Gain proper Gain too low
Examples of proper and improper gain
1. Press the [GAIN] key and the display
shown below appears.
Min Max
50k 3
200k 2
GAIN
Gain adjustment window
2. When using the dual frequency display,
press ▲ or ▼ to choose frequency.
3. Press the [GAIN] key to set. (You may
also use ◄ or ►.) Adjust so that a slight
amount of noise remains on the screen.
4. Press the [MENU/ESC] key to close the
gain adjustment window.
1.8 Choosing Picture
Advance Speed
The picture advance speed determines how
quickly the vertical scan lines run across
the screen. When choosing a picture
advance speed, keep in mind that a fast
advance speed will expand the size of the
fish school horizontally on the screen and a
slow advance speed will contract it. Note
that the picture is not refreshed when
picture advancement is stopped. Therefore,
use caution when steering the vessel under
this condition.