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1. OPERATIONAL OVERVIEW
1-25
1.16 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.
FAST SLOW
The advancement speed may be set independent of or synchronized with ship’s speed.
1. Click Settings.
2. Click Echo image.
3. Click ▼ in the Picture advance box. 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. SYNC advances the picture according to ship’s speed. See the next
page.
Picture advance options
4. Click the setting desired.
5. Click the OK button.