Sperry Marine Visionmaster FT ECDIS, User Manual

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ECDIS User Guide Basic Operation of ECDIS
3-47 65900012
Zoom Window
The zoom window function enables the operator to adjust the scale and
geodetic centre of a chart window by zooming into a specific area of the
chart display.
A zoom window can be independently applied to both primary and
secondary chart windows.
When a zoom window has been selected TM limits are switched off and the
motion mode button displays
TM Limits Off .
To access the zoom window function do the following:
1. Right click in the area of the chart display where you want to zoom
into.
2. Select Zoom Here from the semi-
transparent window. A dotted rectangle box
appears, centred where the right click action
was made. The proportions of the zoom box
are directly proportional to the chart
window.
3. To cancel the zoom action right click, the box disappears from the
screen. The box will also disappear from the screen if the cursor is
not moved for a period of about five seconds.
4. Set the zoom box size by moving the trackball. When the box is
displayed at the required size left click. The window zooms to the
selected area, the scale ratio changes in accordance with the size
of the zoom area and the TM limits are switched off.
5. To re-apply TM limits click on TM Limits Off in the upper toolbar,
or to re-apply TM limits and centre own ship click on the Centre
button in the lower toolbar.