Northrop Grumman Sperry Marine VisionMaster FT, User Manual

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Targets Radar/Chart Radar User Guide
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Polygonal Acquisition Zones
A polygonal acquisition zone is a randomly shaped zone constructed from
operator defined zone points (maximum of 10), which are entered directly
on to the chart display.
Polygonal lines may be drawn up to a maximum distance of 40 NM from
own ship.
To create or edit a polygonal acquisition zone, do the following:
To create a polygonal zone:
1. Click on the New button of Zone 1 or Zone 2 and move the cursor
to the desired location in the chart display. The cursor is shown
with the letters `
Add' below the cross hair and the `New' button
changes to Cancel , the Active and Edit buttons are disabled.
2. Left click in the display, the first zone point is created and is shown
on the screen as a small purple circle.
3. Move the cursor and left click again, a
second zone point is created and the two
circles are joined with a straight purple line.
To create the polygonal shape continue the
process, the last zone point (maximum of 10)
must be entered at the first point.
When the last zone point has been entered
the polygonal shape is created. The zone
point circles are removed, the zone line changes to green and the
zone is auto activated.
To edit a polygonal zone:
1. Click the Edit Off button of the polygonal zone to be edited, the
button changes to Submit . In edit mode all acquisition zones are
displayed on the screen, with the zone to be edited shown in purple
(edit mode) with all zone points displayed.
2. Move the cursor to the first point, the
cursor changes to a bidirectional arrow
indicator. Left click on the point, hold
down the left button and use the trackball
to drag the point to the required location
on the screen. Repeat the process for all
other zone points. Note that targets in an
edited zone are not activated.
3. When the zone is changed to the required shape and position click
the Submit button. The zone is activated (shown with a green line)
and the Edit is switched off.