Yep that's exactly what I did and now that I've got my finder with GPS I can pull up the spot on my phone and mark them on my finder. As for the blue only over at Conway.....it's just some lakes like that. Pan over to those Hot Springs lakes or even Nimrod and take a look at all the iso bars and marked stuff, pretty neat. I fish on Dequeen, Gillham, Deirks, and over on Pine Creek in OK and none of those lakes show much on my Iphone Nav. For the most part they are accurate but some area's you'll find are shallower or deeper than your phone shows but for the most part if you watch your cheaper finder while idling around in the boat on lakes that have a little bit of depth change you'll see it matches up with depth changes. Here's how I marked my spots on the phone: Dequeen 15-20' CB5. That's the lake, then depth range, then CB for crappie brush and like 5 for the 5th spot I marked, next would be number 6 and so on. I found it's easier to go back and look it up on the phone that way when you fish multiple lakes. Now my only test will be once I get the chip for my finder, that's able to read it already, can I transfer or sink all those spots straight over from the phone Nav. to the finder Nav.??? I ain't bought the chip yet though.