So, I just ordered my first humminbird. I went with the helix 7 g2n si. I知 seeing a lot of talk about the lakemaster or Navonics cards. Is this something I need to have? From what I understand they show topography and depth charts for the lakes. I guess it痴 personal preference but I知 wondering if it would be worth it since this is my first time using a unit like this. This will be a huge step up from the Garmin striker 4cv I was using. I知 really excited to get my new unit and play around with it. Just not sure if I should go ahead and order a card or not. Any info is appreciated. Thank all.
Jman


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