They may be nice for backup, but they really are not nearly as reliable
as a well designed dedicated marine plotter, compass and AIS. Wifi
wouldn't matter to a compass app, or a charting app, but I'm thinking
the fool was relying on a land based AIS app to spot ships. I've heard
people in forums recommend using one of these apps, but they have no
idea that it is not nearly the same thing as directly received AIS
information. The land based apps tend to have delayed information, or
intermittent information, as well as often not reporting all ships in
the area. Wrong or incomplete information is not necessarily better than
no information. It may lead you directly into trouble.
https://www.cnet.com/news/boat-captain-uses-ipad-as-compass-crashes-uk/#ftag=CAD590a51e
Bill Bina
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