Navionics Platnum or Premium poll question

[adjust555]

Going to pick up a navionics chip for my Humminbird 997c si. Which one do you think is better. Do I need a platnum fo about $40 more ?
Thanks,
Vince

[APKape]

I was looking to purchase a card. After reading their disclaimer, I’m not sure. The disclaimer reads the maps are only to aid in navigation, but are not intended for navigation. But, if I needed to choose it would be the Premium. For me, there's no need for the 3D lake topo and satellite views. If I want to know what's around the lake, I'd use Google Earth for FREE..

[TAE73]

They are both worthless for the upper end of truman lake. When the they came to do the 1' contour mapping the lake was froze over so lots part missing around bucksaw and the lake runs out of water above higway c on the osage arm according to the map.

[adjust555]

They are both worthless for the upper end of truman lake. When the they came to do the 1' contour mapping the lake was froze over so lots part missing around bucksaw and the lake runs out of water above higway c on the osage arm according to the map.

Thats not what I wanted to here. I can live with out true Stockton maps since I fish it regularly. Now Truman is another story. I was hoping with all the trees up there that one of them would help me navigate the channel.
What would you suggest TAE73?

[badaxed]

"fishing hot spots" "286 premier lakes" " southern usa"? I was on Truman last year with this chip for my lowerance 522c and this seemed to be working as per the depth finder readings.