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Introduction
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• Raster – A paper chart that has been scanned into
a high resolution image. A raster chart
has the advantage of being virtually
identical to the original paper chart from
which it was scanned. The MapTech
NOAA/BSB and PCX charts are
examples of raster charts.
• Aerial Imagery – A high resolution, geo-referenced rasterized
photograph taken from aerial or satellite
sources. You can overlay your vessel’s
position on such an image, and get a
visual estimation of your position with
reference to actual, photography-based
landmarks. The MapTech Photo Region
chart is an example of an aerial imagery
chart.
Comprehensive Weather/Oceanographic Reporting
Navigator offers you the capability to download and display the latest
weather and ocean conditions, and then superimpose this information
upon your charts in several layers. Weather and oceanographic (sea
tides and currents) files (in GRIB format) can be downloaded directly
from the internet or requested via email. After you have acquired your
files, you can fully animate them to show the predicted weather and
ocean currents over a specified period of time. Typical weather files
contain information in 6, 12, and 24 hour intervals, covering a period
of several days. Navigator can further break this information down
into intervals as small as 30 minutes, giving you a comprehensive
presentation of atmospheric and marine conditions.