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8
Fast Slow
Picture and picture advancement speed
1. Press the [MENU/ESC] key to open the
menu.
2. Choose PIC. ADVANCE from page 1 of
the menu.
3. Press ► to show the options window.
Stop
1/16
1/8
1/4
1/2
1/1
2/1
4/1
(
)
Fast
Slow
Picture advance options window
4. Use ▲ or ▼ to choose picture advance
speed desired. The fractions in the
options window denote the number of
scan lines produced per transmission.
For example, 1/8 means one scan line
is produced every 8 transmissions.
“Stop” freezes the display and it is
convenient for observing an echo.
5. Press the [MENU/ESC] key to close the
menu.
1.9 Measuring Depth
The VRM (Variable Range Marker)
functions to measure the depth to fish
schools, etc.
1. Press ▲ or▼ to place the VRM on the
object which you wish to measure
range.
2. Read the VRM depth just above the
VRM.
0
20
40
60
80
49.6
39.8
VRM
VRM depth
50k
1/1
How to measure depth with the VRM
1.10 A-scope Display
This display shows echoes at each
transmission with amplitudes and tone
proportional to their intensities, on the right
1/4 of the screen. It is useful for estimating
the kind of fish school and bottom
composition.
Note: In the dual frequency display, the
A-scope display is only available with the
high frequency display.
32.3
10
20
30
40
0
A-scope display
Single frequency display
Strong
reflection
(bottom)
Weak
reflection
(fish or noise)
50k
1/1
Strong
reflection
(fish)
A-scope display