Many here and other forums recommend jandhproducts for purchasing the HB 1197c Si....
When looking at this item listing in the jandhproducts website they actually show 4 different 1197 models to choose from...
1197 C Display Only
1197 C Combo
1197 C NVB Display Only
1197 C NVB Combo
I understand that NVB refers to the Navionics bundle......
But, what is the difference in the "Display Only" and the "Combo" ....??
