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