Sperry Marine Visionmaster FT ECDIS, User Manual

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ECDIS User Guide Electronic Range and Bearing Lines
65900012 9-7
Variable Range Marker (VRM)
Each VRM can be turned on or off independently. Previous settings are
remembered after being switched off. Default range values for VRMs is
VRM 1 - 2.5 NM; VRM 2 - 4.5 NM.
To turn on a VRM do the following:
1. Left click VRM button. This becomes
highlighted and the range value
entered is displayed. The VRM is
shown as a dashed circle centred on
the CCRP. The size of the circle is
shown by the VRM range readout.
Alternatively, turn the VRM rotary control on the control panel to
switch on VRM1.
2. To turn the VRM off, left click the VRM button. The VRM is
removed from the display and the range value is replaced by “Off”.
To change the VRM range do the following:
There are two methods of changing the range of a VRM.
1. To change from the VRM readout, follow the procedure described
in `Changing the ERBL Range’;
Or:
1. Position the over the VRM circle line, the cursor changes to .
2. Left click and hold on any point of the circle line.
3. Move the trackball left or right to change the size of the circle.
Range readout automatically changes in the VRM field.
4. When the range is correctly set left click to accept.