Four public State ramps, that's great to hear.

I looked online and couldn't find any Sandusky Bay contour fishing maps offered any longer.

I have a Navionics boating app on my phone that shows contour lines that could help on your boat if your fishfinder doesn't have any mapping. What's been cool about it is you can go anywhere in the U.S. with it.

I don't know of any fishing apps that include contours, they may exist. I need to look for some.