If you get a Lowrance with Insight already loaded on the unit, yes it shows public ramps, depths, contours, creeks and their names, etc. My units are 3-4 yrs old but lake info doesn't change that much. Can't speak for newer units or map cards. The base maps on HB's show water/blue, and that's it. Should probably go to a big box store and punch some buttons on new units to see what is offered. The mfr's are wanting you to buy those mapping cards so they put very basic info on the gps models.
GO BIG ORANGE !
I meant to behave, but there were just way too many other options available at the time.