Raymarine L1250DRC, Руководство пользователя

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Chapter 5: Adjusting the Display 5-27
Mov
ing A
round
th
e
Cha
rt
Changing the Chart Scale
The
RANGE
key enables you to change the chart scale so that you can see a
smaller or larger area on the screen.
Plotter mode is available to enable you to zoom into a smaller area, even when
no chart data is available for that scale.
Section 4.5 describes how to set plotter
mode on/off.
The cartographic detail available on charts varies according to the chart scale
and some areas include detail at smaller scales than others. This can cause
blank areas on the display when adjacent areas with different levels of detail
are displayed. To reduce this effect you can use the Chart Set Up options (see
Section 4.5 ) to set chart display detail to simple. Then, as you zoom in, charted
areas are displayed but with less detail shown.
You can change the chart scale for two purposes:
• To see either more detail (of a smaller area) or a larger area (in less detail)
on the screen.
• To move the display to another area of the chart, by zooming out to a small
scale chart, then zooming in on another position centered on the cursor.
Each time you press the
RANGE
key, the chart scale changes to the next
available setting. The status bar indicates the distance from top to bottom of
the screen, in nautical miles.
➤
To change the scale quickly, press and hold the desired arrow on the
RANGE
key.
The distance indicator at the left-hand end of the status bar is updated
whenever you change the chart scale.
➤
To zoom in to a larger-scale (more detailed) chart:
1. Use the trackpad to position the cursor in the area you wish to see in more
detail.
2. Press the lower part of the
RANGE
key to zoom into the area.
The section of the chart around the cursor is enlarged to fill the screen with
a larger-scale chart showing more detail. The cursor is now positioned in
the center of the screen.
The distance indicated at the top left of the screen is updated.
RANGE
D4175-3
Increases the
chart distance
Decreases the
chart distance
Vertical distance
displayed on chart
Status Bar
6nm
CSR 50 45'980N
POS 001 01'490W
RANGE
RANGE
81213_1.book Page 27 Monday, March 17, 2003 1:14 PM