How To Interpret The Display - Furuno SFD-1010 Operator's Manual

3. FISH FINDER
4. Select [Temperature] with the arrow keys, then press the ENTER key.
The [°C]/[°F] selection box appears.
5. Select [°C] or [°F] with the arrow keys, then press the ENTER key.
6. Press the MENU/ESC key to close [MENU].

3.21 How to Interpret the Display

This section describes how to interpret actual pictures using picture examples.
Zero line
The zero line shows the signals emitted from transducers and corresponds to the
transducer's position.
The line disappears from the screen when the range is shifted.
Zero line
Bottom
The bottom is usually shown in reddish brown or red because of strong reflection signal
from the bottom. The display colors and the width change with the bottom conditions,
depth, fish finder frequency, pulse length and gain setting.
The "bottom condition" can be analyzed more clearly for operation by making good use
of changes in display colors and width of color pictures.
Difference in width
3-32
Range shifted
Difference in gain setting