Join Date: Feb 2010
Location: Narragansett Bay
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Re: Ipad as sailing instrument....
...I had expressed concerns about the MarineTraffic.com website and MarineTraffic smartphone apps. Those get their data over the internet through a network of volunteer receiving stations that upload their data to a central server. The website warns against using their data for navigation. I am more concerned about blackout zones than time delays, since one of the "volunteer receivers" could go down at any time without warning, leaving certain regions with no coverage.
This is very true. I have a buddy sailed up to RI. He and I planned to rendezvous in open water and flotilla for a week up the coast. He had AIS broadcasting, so I used my iPad on marine traffic to find him. He was there one minute, gone for an hour, back again. It was rediculous. I finally called him on his cell and asked him to read me his coordinates, which I just sailed toward. When I finally found in the binoculars about 5 miles away, he still wasn't on the app.
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