73 Chapter 5: The Chart Application
To overlay aerial photography
1. Press the PRESENTATION softkey.
2. Press CHART LAYERS.
3. Toggle AERIAL OVERLAY to ON or OFF as appropriate.
4. Use the rotary controller to adjust overlay opacity.
Overlay opacity
The opacity level controls how visible the underlying chart view is
with photography overlaid. The higher the setting, the stronger the
overlay.
Overlay area
You can specify whether the aerial photographic overlay is dis-
played for land areas only, or for land and sea areas.
• On Land displays a normal chart view for sea areas and over-
lays aerial photography on areas of land. This can help you
interpret your surroundings while keeping important navigation-
al data visible.
• On Land and Sea displays aerial photography of both land and
sea areas. This can help you distinguish between deep and
shallow water (dark blue and light blue, respectively), and to
view land features simultaneously.
To specify the overlay area
1. Open the Cartography Setup Menu.
2. Select Aerial Photo Overlay.
3. Choose your preferred setting.
5.16 Measuring distance, range and
bearing
Options for measuring distance, range and bearing are outlined in
the table below.
Cursor position
You can determine the exact position, distance and bearing to the
position of the cursor by referring to the cursor position (Csr Pos)
data in the databar.
Ruler
The chart application includes a ruler which accurately measures
the distance and bearing between two points.
To use the ruler
1. Position the cursor at the start-point of the measured distance.
2. Press the DATA button.
3. Press the RULER softkey.
4. Move the cursor to the end-point of the measured distance.
5. Press OK.
To move the ruler
1. To move the start-point, press ADJUST A.
2. To move the end-point, press ADJUST B.
Functions
Distance
between
points
Range from
vessel
Bearing
Range Rings Yes (approx.) Yes (approx.) -
Cursor position - Yes Yes
Ruler Yes Yes
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