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Jeff,
I absolutely stand by what I stated. Please do not confuse my comments with the dedicated and certified professional chart systems that are available and in use, but those are not what Larry has spoken about. Those professional systems are very expensive and they are supported with maintenance subscriptions for continuous updates for both software and source data without which, certifications are no longer valid. Please also note that they are NOT ever used without paper chart back up. This is not hypothetical, please recall a couple of years back the USAF DC9 that was transporting a US Senator in Yugoslavia using electronic Jepperson Plates looking for a local airport and flew into a mountainside in poor visibility because the Plate was in error and that system was certified. Even the professional systems are subject to same limitations I mentioned before. Sure, they are fun to play with, but they are unreliable, inadequately tested, often in error and are dangerous if taken as the last word. Use them at your own risk. Steve "jeff" wrote in message ... Steve Lusardi wrote: Larry, No, the chart source is only one issue in the certification process, it is not getting through to me. The risks are still there and the more elements involved, the greater the risk. I appreciate your enthusiasm, but I for one could not rely on any electronic display for critical navigation anywhere. The basic limitations are there as well, like 100+ pixels per linear screen inch at best, as opposed to 2400+ on a lithograph printer. In order to express the detail, it is necessary to drill down and that info may or not be there. When it is, that's all you see, the big picture is lost. If your hobby is computers and networking, enjoy it, but do not rely on this technology, it is not robust, it is not everywhere and it simply is not ready for prime time. So, are you claiming that anyone who uses a chartplotter is a danger to himself and those around him? While I'm still not ready to give up on paper, my new Garmin 545 (5 inch, hi res) was a joy to use during a mostly fogbound Maine cruise last summer. The biggest change over my 10 year GPS is the speed at which it can zoom in/out. OTOH, I've been playing with a low power Linux laptop with a GPS puck running chart software, and while its fun, I've not been convinced it can replace a dedicated machine. |
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