I get a lot of questions about updating the Navionics cards. Only about 50% of anglers actually register and update their cards. That's like using old fishing line that needs updating. I update my cards at least once a month to ensure that I have the freshest data on the lakes that we wish.
It is super easy and very necessary to have the most current map of the lake.
Here is where you go: https://navionics.secure.force.com/k...date-Your-Chip