• | Position Object Sizes 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. When you start target or position tracking, a marker is used to identify the object. With this function you can increase or decrease the size of the markers.
Use this function to find the object sizes that fit your preferences. This may for example depend on your physical distance from the screen. The choice you make is saved with the user settings.
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• | Bottom Profile For each ping transmitted for a vertical view, the ST90 offers bottom detection functionality. This is an "on/off" switch. Set Bottom Profile to On to see a bottom contour in the current view. Select Apply to all if you wish to use the chosen setting in all the vertical views in the ST90 presentation.
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• | Minute Markers In order to maintain a visual presentation of your vessel’s previous movements, you can draw these with a line. This line is drawn after the vessel symbol in the ST90 presentation, and visualizes your past movements. The Minute Markers function adds markers to the line to indicate the travelled distance for each minute. The minute markers are shown as small circles on the vessel’s track line.
To draw the line use the settings on the Track Line page. The Track Line page is located in the Display Options dialog box. The Display Options dialog box is located on the Display menu.
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• | Markers 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. Use this function to control if and how the marker symbols are shown in the currently active view. Select Apply to all if you wish to use the chosen setting in all the views in the ST90 presentation.
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• | Tracks When you start target or position tracking, a marker is used to identify the object. Each marker is shown as a small circle with or without a short identifying text. Use this function to control if and how the tracking markers are shown in the currently active view. Select Apply to all if you wish to use the chosen setting in all the views in the ST90 presentation.
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• | Minute Markers Tracks When you start a target track, a dedicated marker is used to identify the object you are tracking. When enabled, Track History draws a line after each tracked target. The line identifies the previous positions of the target. This function adds markers to the track history. These indicate the target’s travelled distance for each minute.
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• | Track History When you start a target track, a dedicated marker is used to identify the object you are tracking. Each marker is shown as a small circle with or without a short identifying text. In most cases, the target will move and continuously change its position relative to your own vessel. When enabled, Track History draws a line after each tracked target. The line identifies the previous positions of the target. This allows you to manually predict its current heading.
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• | Speed Vector Speed Vector shows you the predicted course and speed of the tracked target. The prediction is based on target’s current movements. The estimate is limited to one minute.
The information is provided with a line indicating the target’s course. The length of the line reflects its speed.
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• | Bow Marker This function displays a dotted line drawn from the bow of the vessel symbol. The line reflects your vessel’s current heading.
Do not confuse this line with the bearing line.
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• | Current Vector This function shows you the speed and direction of the water current under your vessel. The function draws a line starting under the vessel symbol. The direction of the line indicates the direction of the water current. The length of the line reflects its speed.
For this function to work, a sea current meter must be connected to the ST90. The use of an ADCP (Acoustic Doppler Current Profiler) is recommended.
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