Objects menu
The Objects menu is - in spite of its name and location - not a menu at all. This "menu" opens a small view to monitor and control the objects you have defined in the sonar views. Each object is identified with a visual marker.
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How to open
Select the Objects icon.
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The icon is located under the Main menu. Select the icon one more time to close the menu.
Description
Once an echo has been provided with a marker in the display presentation it is regarded as an object. The Objects menu provides a list of all current objects. This includes all types of objects including those classified as targets.
If you have placed markers on several echoes to make them objects, you can select one of these and give it priority status. The bearing line in the relevant views will automatically be locked on the object with this priority to reflects its bearing. You can only give priority status to one object. The priority is identified with a "P".
Tip
If you do not need to use the menu system, you can hide it. This allows more space for the echo presentation.
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Use the Menu on the top bar to hide or show the menu. When the menu system is hidden, it appears temporarily on the left or right-hand side of the screen if you move the cursor to that position.
Objects list
Once an echo has been provided with a marker in the display presentation it is regarded as an object. The table at the top of the Objects menu shows you all the objects that are currently identified with markers. Each marked object is listed with the following information:
•  IDThis is the unique identification of each object marker.
Each marker is numbered sequentially.
Objects with allocated markers are identified with an "M" in the Objects menu. Objects that are subjected to target tracking are identified with a "T". You can give priority status to one marker to identify the relevant object as the most important target or position. The priority is identified with a "P".
•  RThis is the range (in metres) from the vessel and to the object identified with the marker.
•  BThis is the true bearing to the object.
•  DThis is the object’s depth (in metres) relative to the sea surface.
Each marker is specified by its geographical position (latitude and longitude) and its depth. Additional information is provided for objects that are subjected to target tracking.
•  Select the check box on the left side of any object to mark it for deletion, or to save it.
•  Select the object line to activate the control buttons, and to retrieve information about the object.
Select All
Click Select All to select all the markers in the list
Delete
Select Delete to delete all the markers you have selected in the objects list. Each marker is removed both from the list and from the ST90 presentation.
New
Select New to add a new marker manually. The New Marker dialog box opens to accept position and depth information.
Export/Import
Once you have defined any number of objects, these can be saved to a file on the hard disk. If necessary, you can later retrieve the file for reuse. The file format is XML. The file is located in the following folder:
c:\ProgramData\Simrad\ST90\Markers
•  To ExternalThis function is not implemented on the ST90 system.
•  To FileSelect To File to save the currently selected objects to a file. The file name is built automatically using date and time information.
•  From FileSelect From File to retrieve the previously saved objects. The Import Marker dialog box offers a list to choose from.
Control buttons
In the object list, select the object line to activate the control buttons for that particular object.
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Priority
You can give priority status to one marker to identify the relevant object as the most important target or position. Select Priority to give the currently selected object a priority status. If another object has this priority, the status is transferred to the new object. The priority is identified with a "P".
Disable Alarm
When you are tracking a moving target, certain target behaviour may trigger an alarm. Select Disable Alarm to disable alarms for the currently selected tracked target.
Suppress Alarm Audio
When you are tracking a moving target, and the target behaviour triggers an alarm, you will hear an audio signal. Select Suppress Alarm Audio to disable the audio.
Alarm History
All alarms are presented under the Alarms tab in the Messages dialog box. Select Alarm History to open the Messages dialog box.
Object information
In the object list, select the object line to retrieve object information about that particular object.Some information is only available for an object that is subjected to target tracking.
Position
Two fields present the geographical position of the currently selected object.
Course/Speed
In the list of objects, select an object on which you have started target tracking. Two fields present the course and speed of the tracked target.
SNR (Signal to Noise ratio)/Acceleration
In the list of objects, select an object on which you have started target tracking. One field presents the acceleration of the tracked target. The Signal to Noise ratio (SNR) gives the strength of the tracked target relative the noise floor defined by the reference cell in the CFAR filter.
Comment
A text field at the bottom of the Objects menu allows you to type comments. You can only do this if you have computer keyboard connected to your Processor Unit.
Insert Relative Position
Select Insert Relative Position to insert object information into the comment field. The information is inserted as a text string that contains the following information:
•  UTC Time
•  Relative bearing
•  Range to own ship
•  Depth