Question for Navionics users in southern Ontario. I have a Helix 9 G4N CHIRP MEGA SI+ MEGA DI+. Which Navionics mapping micro card is best for my area? Navionics + or Navionics Hotmaps Platinum? The difference I see is the satellite imaging & contour shading available on Navionics Platinum however, I don't think that feature is available for lakes in southern Ontario. Thanks in advance!