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.

Before you begin

  • You must be in Customize mode to do this task.

You must have:

  • Incoming GPS data and heading data.
  • Spread or Slant Range sensors with bearing measurement
  • Warp lengths or Slant Range sensors giving distance to vessel

Procedure

  1. Open the customization panel, then go to Geographic.
  2. Click + drag Chart to the page.
  3. Drop it in a yellow area.
    The chart view is displayed.

  4. Click the arrow on the right side of the view to show the display options.
    View


    • White Background: change the chart background to white instead of black.
    • Center on Ownship: center the view on the vessel only.
    • Center on Ownship and Trawl: center the view on both vessel and trawl.
      Tip:
      If the view looks empty it might be because the view is not centered on the vessel. Select one of these last two options.
    Ownship
    • Draw Ownship track: displays the path of the vessel, based on the GPS position.
    • Draw GPS positions: displays points corresponding to the raw GPS positions.
    Trawl
    • Display Door Tracks: displays the path of the doors, according to the door positionning data. Green track is starboard door, red track is port.
    • Display Net Tracks: displays the path of the headline, body or codend.
      Tip:
      For a more accurate position of the headline, complete the trawl measurements in Settings > Trawl > Net.
    • Display Positionning Filter Data: used for development only.
    • Display Positionning Sensors Data: displays raw data used to get the trawl position.

    If the bathymetry feature is activated:

    Note:
    The bathymetry feature is available as an option only.
    Bathy
    • Resolution: you can lower the resolution if the image is lagging.
    • Colors:
      • Automatic depth range: the range of the color scale adjusts according to the minimum and maximum water depth of the area displayed on the chart.
      • Depth range from zero: if Automatic depth range is activated, the color scale adjusts according to the maximum water depth.
    • Display: show on the chart Shaded Relief, Isolines or a Depth Grid (only appears when zoomed in closely).
    The water depth is shown using a color palette on the top left corner of the view. Use the two handles to color in yellow a specific depth zone.

What to do next

Deactivate the Customize mode when you have finished customizing pages: click Menu > Customize again.