Why iphone 4 cannot establish position in the middle of the ocean?

Question

I am in the middle of the ocean and ofcourse no gsm range.
Maps showing that cannot determinat position.
Gsp cannot fix position without gsm support?

Answer 1

Have you power cycled it?  Or maybe just try a simple reset
Reset the iPhone by holding the sleep/wake button at the top right of the device and the home button at the bottom center of the face at the same time.
Hold them both until you see the screen go black and the white Apple logo appear.
When this happens, you can let go - the iPhone is rebooting.
I'm thinking that if the GPS works like, say a Garmin or TomTom, it caches satellite infomation to be able to connect more rapidly the next time it is used.  If that cache is stuck on information that does not apply (where you are now, the satellite's available to it will be different), a reset should flush the cache and force it to re-find available satellite signals.  It may take several minutes to get a fix once you reboot and try it though.