Since HotMaps have contours on our fish finders, I've wondered how to print that or if Navionics has printed versions before they make them electronic.
USGS maps might do the trick. Or save a picture file from an online map and have a copy shop (like Kinkos) print it on large sheets and laminate for you.
I use this and zoom in/out as needed and print using a third party print screen which is embedded and unfortunately, I cannot remember the name of.........