Most economical GPS unit with detailed depth chart maps?

[alwhite00]

You would IF you wanted to use the cellular function. Again, the 3G has an internal GPS capability that does not require cellular activation.

Thanks for the info.

 

[DanW]

I've looked at a external GPS receiver on amazon that you can use on the wifi only iPads. I haven't tried it though so I can't say how well it works. It's $100 right now, but I've seen it drop to $80. Here's the link:

http://www.amazon.com/gp/aw/d/B0035Y7ZJ2/ref=mp_s_a_1_1?qid=1407556024&sr=8-1&pi=SY200_QL40

 

[diveman]

This is what you need to use a non-3G iPad. http://www.amazon.com/Dual-Electron...=UTF8&qid=1407558418&sr=8-1&keywords=Dual+gps

I have used it most of the summer with the Navionics app and it was flawless.

 

[almostenuff]

This is what you need to use a non-3G iPad. http://www.amazon.com/Dual-Electron...=UTF8&qid=1407558418&sr=8-1&keywords=Dual+gps

I have used it most of the summer with the Navionics app and it was flawless.

Brilliant!