Join Date: Mar 2008
Location: Oslo, Norway
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I am very satisfied with "sailcruiser" from navsim. It displays various chart formats. The format I am using is C-MAP. The chart reader also displays AIS information. I have (had) a Furuno GPS but used a USB-antenna for the laptop. Just in case the laptop went down. By the same token I also have paper charts for the same area that I have electronic charts.
When sailing in the North Sea and in the English channel in particular, both radar and AIS is very helpful. Radar for detecting the many fishing vessels, and AIS for detecting and calculating course and speed of the fast ferries.
Use your head, ram the wall till it falls.