Name:   GoneFishin - Subject:   Chartplotters / sonar with Lake Martin cartography Date:   12/28/2017 11:21:49 PM (updated 12/28/2017 11:35:08 PM)

Check this out. I would call Garmin. Also post on the Lake Martin Fishing topic. Contact some of the local guides and the Marine police. They also show some other maps whic I assume are new under the title Lake vu. 

Hold off and go to the BASS Elite tournament at Lake Martin in February and ask the pros what maps they are using for Lake Martin.. 

Let us know what you decide to buy.

http://www8.garmin.com/cartography/inland/g-alse.html

https://www.bassmaster.com/tournaments/2018-bassmaster-elite-lake-martin