I have a Hummingbird 898 HD SI. I fish Green River Lake. GRL is listed as one of the lakes that should have contour lines.
* If you use Hummingbird electronics on GRL, are you able to see contour lines?
* What Navionics card would be best to purchase for this unit. I only fish GRL, Barren, Taylorsville and Herrington.
* Lakemaster does not have GRL.
Thanks,
TG

