CD-Sextant - Build your own sextant - Pole Shift Survival Information

Navigator Light Software
Tip: Since images are large in size, making many visible at the same time would consume a lot of memory.
Making only the charts you need visible reduces the amount of memory used by the program. A memory of at
least 32MB is recommended to use raster charts.
The image resampling process also consumes a lot of CPU power. To reduce the bumpy behavior while
zooming or scrolling, these calculations are implemented in different threads of program execution . That's
why it takes some time for the raster charts to show after you zoom or scroll.
You can also play with raster image opacities, making them partially transparent. This allows you to see how two charts
overlap each other or compare them with the vector chart underneath.
Tip: Partially opaque (i.e. transparent) chart images consume CPU power - a 100% opaque chart will display a
lot faster.
The chart images rendering order can also be changed, using the up and down arrow buttons in the right. The rendering
order is:
1- Background (sea color)
2- Vector chart polygons
3- Chart images (top-down order in the listbox)
4- Routes, tracks and marks
Tip: To transfer a CID file to another computer (or to share it over the Internet) , you also need to transfer the
associated image file (GIF or JPG). Since the CID file contains the image file digital signature, there is no risk
of accidentally changing the image while copying.
Printing Chart Images
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Navigator Desktops containing raster chart images can be printed. You can use this to integrate different charts together in a
single and compact printout. Quality is even better than the computer screen, because printers have a much higher pixel
resolution than monitors (monitors typically 75 DPI x printers 300 or 600 DPI ).
This quality comes at a cost. Ressampled chart images may turn out big, requiring a lot of CPU cycles and memory to
calculate. So be patient and make sure your computer has at least 64MB of memory. If you have a laser printer, limit the
print resolution to 600 DPI. Don´t use 1200 DPI, because this would result in really big ressampled image and would
probably hang your computer.
I´m working to make sure that the printing process is smooth. You may find problems in extreme situations (printing large
chart images with high resolution printers and little memory available).
Partially opaque (transparent) images are not supported by printers. When printing, all chart images will be rendered opaque.
Chart tools
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The Navigator chart viewer has the following tools:
Zoom - Lets you zoom in and out the chart, from
the whole world to a very small scale. To zoom
in, press the left mouse button in the point you
want to focus (screen center). To zoom out, use
the right mouse button or click the left mouse
button with Shift key pressed.
Measure - Click a position and drag the mouse.
The caption will show two numbers: COG and
Range.
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