13 Adding automatic trawl lines to the echogram presentation

Trawl sensor systems (such as Simrad PI, PX and ITI) communicate headrope depth, and/or the distance from the headrope to the footrope (trawl opening), to the EK80 system at regular intervals. The information can be used to draw the upper and/or lower trawl lines in the echogram.

Prerequisites

In order to present the trawl lines automatically, a compatible trawl system must be connected to the EK80. A trawl with the relevant sensors mounted is deployed.

Context

A Simrad ITI (Integrated Trawl Instrumentation) system can be connected to the EK80 system. Communication with the ITI system is based on both NMEA and proprietary telegrams, and all necessary parameters are automatically defined. The information can be used to draw the upper and/or lower trawl lines in the echogram.

Note

This is a visual enhancement. The choice you make has no effect on the overall performance of the EK80 system.

Procedure

Click once in the relevant view.

The view is activated. It is identified with a thick border.

Open the Active menu.

Select Echogram.

Observe that the Echogram dialog box opens.

On the left side of the Echogram dialog box, select Lines to open the page.

Under Lines select Trawl to see the trawl lines in your echogram presentation.

Apply the change(s) you have made.

Select Apply if you wish to apply the chosen setting only to the currently active echogram view.

Select Apply to All if you wish to use the chosen setting on all the echograms of the same type.

Close the dialog box.