8. MULTI BEAM SONAR DFF-3D
8-15
8.6.8 How to use terrain shading
The thickness of the shading for the seabed terrain can be adjusted.
1. Open the [3D Sounder History] menu.
2. Set the thickness of the shading with the software keyboard or slider bar at [Ter-
rain Shading]. The default setting is 50.
3. Tap the close button on the title bar to finish.
8.6.9 How to change the picture advance speed
The picture advance setting sets how quickly vertical scan lines move across the dis-
play. When viewing a seabed with sharp rises and falls such as a reef-bed or sub-
merged wreck, a fast advance speed helps to “smooth out” the seabed for easier
viewing. On the other hand, when viewing a smooth seabed with little to no undula-
tions, a slow advance speed helps to identify rises and falls.
You can change the picture advance speed as follows.
1. Open the Home screen, then tap [Settings]→[Multi Beam Sonar].
2. Tap [3D Sounder History].
3. Tap [Picture Advance].
4. Select an advance speed to suit your requirements.
The default speed is [1/1] (normal speed), the fastest speed is [4/1] (four times
normal speed) and the slowest speed is [1/8] (eight times slower than normal
speed). Select [Stop] to stop the picture advance for closer examination and
screenshots/photos. The following figure shows examples of the same object at
[4/1], [1/1] and [1/4] speeds.
The picture advance speed can also be adjusted from the Layers menu.
Setting: 0 Setting: 50
Setting: 100
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