How To Smooth Echoes (Distance); How To Smooth Echoes (Time); How To Apply Correction To The Speed Of Sound - Suzuki SMD16 Operator's Manual

9. MULTI BEAM SONAR FURUNO DFF-3D
9.4.4

How to smooth echoes (distance)

If echoes are "disconnected" because of an undulating seabed, change the setting to
[Low], [Medium] or [High] as necessary. Smoothing is done in the range direction to
smooth the echo presentation.
1. Select [Settings] on the home screen.
2. Select [Multibeam Sonar] - [Cross Section].
3. Select [Echo Smoothing (Distance)].
4. Select [Low], [Medium] or [High] as required. The default setting is [Medium]. Se-
lect [OFF] to stop smoothing.
5. Select [Close] to close the pop-up menu.
9.4.5

How to smooth echoes (time)

If echoes are difficult to see because they appear "speckled," use the echo smoothing
feature to suppress the speckling by time.
1. Select [Settings] on the home screen.
2. Select [Multibeam Sonar] - [Cross Section].
3. Select [Echo Smoothing (Time)].
4. Select [Low], [Medium] or [High] as required. The default setting is [Medium]. Se-
lect [OFF] to stop smoothing.
5. Select [Close] to close the pop-up menu.
9.4.6

How to apply correction to the speed of sound

Even though the sea bottom is flat, the left or right edge, up or down may be distorted.
To compensate for this problem, adjust the speed of sound.
Manual correction
1. Select [Settings] on the home screen.
2. Select [Multibeam Sonar] - [Cross Section].
3. Select [Sound Speed Correction], then enter a correction. The setting range is
-200 to +200.
4. Select [Close] to close the menu.
Automatic correction
1. Select [Settings] on the home screen.
2. Select [Multibeam Sonar] - [Cross Section].
3. Select [Temp.-based Correction], then select [ON].
Select [OFF] to remove the correction.
4. Select [Close] to close the menu.
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