Join Date: Feb 2010
Location: Narragansett Bay
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Re: Navionics for BVIs with iPad 3G Question
All correct above. If you have the built in GPS, it will work with the 3G and wifi signals disabled in Settings. There are aviation apps that require you to do so, as the continuous search for a signal will kill the battery.
The only advantage of either signal is the time it takes to lock on to your initial position. If the device already knows what general area of the planet it's in, it knows exactly which satellites to look for. Otherwise, that first fix takes a minute or so, but has zero impact on functionality after that. No big deal.
Probably worth mentioning that there is absolutely no need for GPS to navigate in the BVI. Always line of sight down there. However, I used Garmin's app when down there in the winter. I never bothered with a route, but its nice to quickly determine distance to a harbor when enroute to estimate time of arrival. That can be helpful to decide on eating ashore or aboard, stop to snorkel, get there in time for a mooring ball, etc, without having to pull a chart and dividers.
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