• | Initiate Track During normal operation, some echoes are clearly more interesting than others. In many situations specific echoes may be regarded as targets. To set up the SU90 system to provide such information, you can start target tracking.
The Initiate Track function allows you to manually start target tracking.
Place the cursor over the echo you wish to track. Select Initiate Track. The tracked target is regarded as an object, and it is identified with a circle and two lines. The bearing line is automatically locked on the object to reflects its bearing. A new manually initiated tracked object is automatically given priority status. If another object has this priority, the status is transferred to the new object. The priority is identified with a "P".
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• | Place Marker The Place Marker function allows you to create a marker at the current position of the cursor. Each marker is shown as a small triangle with or without a short identifying label.
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• | Delete Marker Delete Marker allows you to delete a marker from the current view. Select Delete Marker.
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• | Set Priority Marker One marker can be given priority status to identify the object as the most important target or position. If another object has this priority, the status is transferred to the new object. The priority is identified with a "P" When a marker is given priority it can be regarded as a position track. Relevant information about the priority object can be found in the lower left corner of the view.
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• | Place Own Ship Marker Select Place Own Ship Marker to add a square symbol to the vessel’s current position in the echo presentation. The own ship marker is now regarded as an object. All information about the object is shown in the Objects menu listed as "OSM".
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• | Delete Own Ship Marker Use Delete Own Ship Marker on the shortcut menu to delete the marker from the current view.
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• | Place Marker Continuous Place Marker Continuous is an on/off switch. When enabled, left-click in a SU90 view to add new marker. Each click produces a new marker.
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• | Place Circle Marker Press Circle Marker on the Operating Panel, or select Place Circle Marker to add a circular marker to the SU90 presentation. A circular symbol appears at the cursor position. The circle is drawn with the same diameter as your purse. By means of the circle you can see the size of the school relative to your purse. You can only add one circle marker to the display presentation.
The Objects menu does not provide any information about the circle marker.
To delete the circle marker, press Circle Marker on the Operating Panel, or right-click to select Remove Circle Marker on the shortcut menu.
The Fishing Gear function allows you to define the size of your trawl or purse seine. This function is opened from the Setup menu.
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• | Show Gear Symbol The gear symbol is provided as a tool to help you plan and shoot the purse seine.
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• | Place Ruler Place the cursor over the first echo. Right-click to open the shortcut menu, then select Place Ruler. The ruler starts wherever you place the cursor, and ends when you release the button. The length and relative bearing of the ruler is displayed next to it. Once a ruler has been established you can not make changes to it. You can place as many rulers as you like in the view.
Select Delete Ruler or Delete All Rulers on the shortcut menu to delete the one or several rulers from the view.
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• | Delete Ruler Use Delete Ruler to remove one selected ruler from the view. Place the cursor on the line, right-click when the cursor turns into a finger, then select Delete Ruler from the shortcut menu.
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• | Delete All Rulers Delete All Rulers allows you to delete all the rulers in the current view.
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• | Ship To Centre Select Ship to Centre to move the own ship symbol back to the centre of the view. This function is typically used when you have used the Set New Ship Centre function to move the ship symbol away from the centre of the view.
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• | Reset Ship Centre This function is useful when you need to "reset" the view after using the Set New Ship Centre or Zoom functions. Right-click and Reset Ship Centre to move the vessel symbol to the centre of the presentation.
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• | Set New Ship Centre Place the cursor anywhere in the view, right-click and select Set New Ship Centre. The function moves the vessel symbol to the selected position.
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• | Zoom Place the cursor anywhere in the view, right-click and select Zoom. Only one zoom level is provided. Select Zoom one more time to restore the original view.
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• | Erase Echoes Select Erase Echoes to "refresh" the view by deleting all the current echoes.
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