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Display Configuration
Read this section to know how data are displayed on Scala and how to change their display.
Customizing the Display of Data
Echograms
Echograms are a representation of what is detected by the sensors with the acoustic signals.
Displaying the Bottom Line
You can display lines on an echogram to mark the bottom of the trawl and the beginning of the seabed.

Display Configuration
Read this section to know how data are displayed on Scala and how to change their display.
- Control Panels
- Sensor Data
- Ownship & Trawl Data
- Data Estimation
- Receiver Data
- Creating Data Pages
- Managing Windows
- Customizing the Display of Data
  - Echograms
    Echograms are a representation of what is detected by the sensors with the acoustic signals.
    - Adding an Echogram
      You can display an echogram view on a page.
    - Changing the Echogram Colors
      You can change the default colors of the echogram. The ability to configure the color palettes is interesting to highlight specific things, for example to clearly distinguish the sea bottom from fish targets.
    - Displaying the View from Surface to Seabed
      You can choose to display the echogram beginning from the water surface instead of the default view from the sensor position. Depending on the type of fishery, this is useful to see the trawl descent from the sea surface to the seabed.
    - Displaying Echograms of Seine Sensors
      You can display an echogram image of the contents of a seine purse when using a Seine sensor with side-looking option.
    - Displaying the Bottom Line
      You can display lines on an echogram to mark the bottom of the trawl and the beginning of the seabed.
    - Adding a Range Marker
      You can set a range marker at a given depth, for example if you need to ensure that your trawl net stays at this depth. It is called a Variable Range Marker (VRM).
  - Zooming on Timestamp and Distance Scale
    In echograms and history plots, you can zoom in and out on the distance scale and timestamp and move them along.
  - Sensor Numerical Data
    Data such pitch and roll, temperature, depth can be displayed in dials, gauges, history plots or text format.
  - 3D Views
    You can display 3D views of different elements from the system, for example the trawl doors or trawl speed sensors.
  - Displaying a Position Marker
    You can place a marker on plots and echograms to display the GPS position at a given time on the timestamp.
- Setting an Alarm on Incoming Data
  You can be alerted by an alarm when data received have a given value.
- Changing the Default Units
  You can change the default units of data displayed in Scala.
- Recording and Replaying Data
  Data received by Scala can be replayed with Scala Replay application.

Displaying the Bottom Line

You can display lines on an echogram to mark the bottom of the trawl and the beginning of the seabed.

Procedure

Right-click the echogram, then click Draw Bottom Line.

A yellow line appears at the bottom of the trawl and a white line appears at the beginning of the seabed. On the example below, the first echogram does not have a bottom line and the second has one.

Note: In sensors data, the opening is the distance between the sensor and the yellow line and the height is the distance between the sensor and the white line.