I have a Garmin GSMap 210 that came with my boat and works fine however I need a G chart electronic cartridge for Lkae Michigan. It is model GUS190SL.

Garmin quit making them some time back and I haven't been able to locate one. Rather than replace the unit I wonder if anyone has an idea as to where I can find one.

Hope you can help!

Gary Welch
WetlandsII, #1480
:confused: