About the echogram views
The EK80 system supports several different echogram types. Each echogram is shown in a separate view in the display presentation. The tabs at the bottom of the display presentation allows you to choose which channels to open.
Selecting echogram views on the bottom bar
The number of tabs available on the bottom bar depends on how many channels your system has. Two tab "groups" allow you to select channels and views. This example shows a EK80 system with two channels. In this context, the term channel is used as a common term to identify the combination of transceiver, transducer and operating frequency.
By means of the Presentation Modes dialog box you can change the order of these tabs, and you can add your own tabs.
| A | Presentation modes Three presentation modes are available when you wish to see all the echogram channels simultaneously in the display presentation. The three tabs will arrange the echogram views vertically, horizontally, or in rectangular rows and columns.
By default, the views are arranged automatically in the presentation. You can change the physical size of any view. Click on the view border, hold the button depressed, then drag the border to create a smaller or larger rectangle. Note that the size of the other views are changed accordingly!
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| B | Selecting individual echogram channels Each channel is shown with a dedicated tab. The channel is identified with the name of the transducer in use. This name is the custom name you provided when you installed the transducer. Select a specific transducer tab to see only that channel in the display presentation.
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Supported echogram types
| • | Surface: A Surface echogram is mainly used when you wish to look at the entire water column starting from the sea surface and down to the sea bottom. |
| • | Bottom: A Bottom echogram is mainly used when you want to examine the echoes from fish close to the sea bottom. |
| • | Pelagic: A Pelagic echogram is mainly used when you wish to look at the water column starting from any distance below the sea surface down towards the bottom, but without seeing the bottom contour. |
| • | Trawl: The Trawl echogram covers the vertical opening of the trawl with reference to the depth of the headrope. |
Selecting which echogram type to use
Once one or more echogram views are open, you can choose which echogram type to see.
Click once in the relevant view. The view is activated. Open the Active menu, click Echogram to open the dialog box, and select Echogram Type on the Echogram page.
In each echogram view, you can also select from a number of markers, lines and annotations to enhance the echogram, or to
provide additional information. These can be selected on the Lines page in the Echogram dialog box.