Hey sorry to gate crash this forum but I did a search for a GPS on the iPhone but was unable to find anything here.
Is anyone using their iPhone as a GPS?
Im just wanting it to see how fast I am going.
Thanks
My son uses his iPhone GPS for car navigation with Tom Tom. I think it has the sirf3 GPS chip. If it does you should be able to get an NMEA file to save and download to your computer. That file should have the Doppler data in it as well.
You may need to download and install some sort of logging app. to make it log the data.
It would be a shame if you got the iPhone wet though.... 
Make sure you use a very good waterproof bag and even put it inside a zip lock bag inside that as well.
You can get almost anythign on ipones, as there are countless usefull appliactions.
Yes you can get a GPS application, whether its navigating like a tomtom or marking fishing spots with lat vs long
