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4. VIDEO SOUNDER OPERATION
4-16
4.10 Picture Advance Speed
The picture advance speed determines how quickly the vertical scan lines run
across the screen. When selecting 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.
The advancement speed may be set independent of ship’s speed or
synchronized with ship’s speed.
4.10.1 Advancement independent of ship’s speed
1. Press the [MENU] key.
2. Press the SOUNDER MENU soft key.
3. Select PICTURE ADVANCE, and press the EDIT soft key to open the picture
advance window.
PICTURE ADVANCE
▲
2/1
1/1
1/2
1/4
1/8
1/16
STOP
▼
Picture advance window
The fractions in the window denote the number of scan lines produced per
transmission. For example, 1/8 means one scan line is produced every eight
transmissions. STOP freezes the display and it is convenient for observing
an echo.
4. Use the cursor pad
to select speed desired.
5. Press the RETURN soft key followed by the [MENU] key to close the menu.
Note: For the C-MAP specification unit, when using the plotter/sounder
combination display, advancement of the sounder picture may be
temporarily interrupted while the plotter display is being shifted or its
display range is being changed.