Join Date: Jan 2012
Location: San Francisco
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Navionics for BVIs with iPad 3G Question
I know there have been numerous and recent threads on the topic of iStuff navigation, GPS chips, etc., so apologies if this info is available somewhere (I couldn't find it).
We are heading to the BVIs later this month and I have downloaded the Caribbean charts for Navionics app we use on our iPad2 3G - we use Navionics for tracking and for short cruises on/inside SF Bay, so I figured just spring for the Caribbean version since we're used to the application (though iNavX seems more well-liked on this forum). Our charter boat has GPS, but this will be a nice mobile version, or back up if GPS fails.
I understand the 3G has the GPS chip. My question is whether the iPad can receive GPS satellite signals for accurate positioning while WIFI and 3G are turned off.
On the water, we won't obviously have WIFI capabilities, not sure this is even relevant. But do we need to have 3G operating (i.e. NOT in Airplane Mode) in order to get a proper fix? Or can the device work with the satellites and not the 3G towers?
I'm prepared to purchase a Garmin Glo or similar device that works with the iPad, but don't want to unnecessarily if the iPad's GPS will do the trick. I'm also not clear on whether we'll be hit with $$ 3G data roaming charges if the iPad is using those signals for positioning, and obviously want to avoid it.
Lastly, will Navionics require some signal to have the chart information available at all zoom levels, or does it remain on the device once it's been accessed? I understand tide/weather/ data offered by this program will require 3G or Wifi to access.
Any information would be helpful, and for those of you who've been to the BVIs in recent months who have other relevant findings on the general topic, by all means share!
Tartan 4100 - SF Bay