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Display Configuration
Read this section to know how data are displayed on Scala2 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.
About the Echogram Display

Display Configuration
Read this section to know how data are displayed on Scala2 and how to change their display.
- Control Panels
- Customization Panels
  The customization panels contain customization options for the data.
- Receiver Data
- Using the Virtual Charger Room
  You can display the fleet of sensors in Scala2 Virtual Charger Room, when sensors are connected to the Dock or trawling.
- 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.
    - Displaying an Echogram
      You can display an echogram view on a page.
    - Echogram Display Settings
      You can apply different display settings to the echogram.
    - About the Echogram Display
    - 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.
    - Changing the Distance from the Door Sounder to the Bottom
      You can change the distance at which the Door Sounder echogram begins.
    - 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 the Chart View
    You can display the location and trajectory of the trawl behind the vessel if you receive GPS data and have door positioning 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 Scala2.
- Recording and Replaying Data
  Data received by Scala2 can be replayed with ScalaReplay2 application.

About the Echogram Display

By default, Scala2 displays a real-time echogram. The progression of the echogram is based on time, so it can be time-synchronized with other real-time echograms or plots. This synchronization can for example help you to better follow a target by comparing the echograms. The global position cursor can also complete the information.

On the example below, Scala2 displays an echogram from a Speed Navigator placed on the headrope (top of the screen), and one from a Trawl Navigator placed approximately 30 meters back on the net (bottom of the screen).

Fish are first detected close to the bottom by the Speed Navigator (1). Then, approximately 20 seconds later, the Trawl Navigator detects them inside the trawl (2). Because both echograms progress at the same speed, the time period between the targets seen on the echogram will always stay the same.

If the acoustic signal from the sensor is not received, the last sonar data is repeated for a few seconds, then stopped. This will show black lines on the echogram. See image below. Read the topic Troubleshooting for potential solutions.



1. Repeated sonar data / 2. Loss of reception

Scala2 also has a Fixed beam Width echogram. This type of echogram progresses only whenever sonar data is received. Because sonar data are usually not received at the same time by all the sensors, this echogram cannot be time-synchronized with other echograms and plots and it does not work well when displaying two signals simultaneously (for example up/down). The time progression is usually monitored using the yellow lines on top of the echogram, one yellow line corresponding to 1 minute. If the sonar data are not received correctly, the timescale and yellow lines will shrink.