Need GPS advice

I got an old but in good condition Garmin 120 for $60 on ebay that I put on my Mako 17 and am very impressed with it. I can find my way around with buoys and charts but in foggy weather its a nice option to have even for compass guys like me...Frank

I got an old but in good condition Garmin 120 for $60 on ebay that I put on my Mako 17 and am very impressed with it. I can find my way around with buoys and charts but in foggy weather its a nice option to have even for compass guys like me...Frank