[jgalvin]

Does the aGPS in the current iPhone work if there is no connection to another data source (3G or WiFi). Will the same be true of the iPad?
Thanks

[GPSNavX]

Only iPhone 3G, iPhone 3GS and iPad 3G have an [assisted] GPS receiver. In addition iPhone 3GS and iPad 3G have a compass.

Yes the [assisted] GPS can acquire an accurate position without needing a cell or WiFi connection. The acquisition can take longer without assistance.

http://arstechnica.com/apple/news/2008/1...ection.ars

[richardsstephens]

I've just heard from a friend who is 5 days into a passage in the Caribbean. His iPhone can no longer acquire a GPS signal. Maybe the almanac data gets too old after several days, and the GPS cannot do a cold-start.