I have a Eagle fishMark 480 and could use some advise.
1. when to have fish symbols on or off?
2. when looking for crappie when do you look for fish l/o structures?
3. any other advice that may help?

I have a etrex Legend a hand unit and put the inland lakes info. on eufaula lake contour lines are at 7,12,17,22 feet but Oologah is only 18 and 28 ft. which is not close enough. And I must go to my computer to change from eufaula to Oologah which is a problem. "We live and learn"

I enjoy crappie.com a lot, thanks