No dumb questions ?

I once used all hummingbird depth finders . Now my newer boat has all Garmin . The Garmin maps have enough detail but do not have as many creek names ect . Is there a chip/card to make the Garmin as an equal to the bird with " lakemaster " southeast plus ?

Garmin Navionics+ or Garmin Navionics Vision+ are the upgraded map cards. You can go to Garmins website to look at the features and see if they will work on your units.