I have the Lowrance Expedition with street map & Navionics chips, great in the car, bush or on my boat, your boat or any where you go, I have a small boat but fish out of a lot of buddies boats so I can take it with me to find my way points while with them & mark new ones we find while not in my boat, H2O will work too, colour is nice, shows the change in water depth better
Richard