Raymarine Marine GPS System manual Comprehensive Weather/Oceanographic Reporting

Models: Marine GPS System

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Introduction

∙ 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.

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Raymarine Marine GPS System manual Comprehensive Weather/Oceanographic Reporting