no maps, it is just a GPS, you add your own numbers and waypoints and this will take you there everytime.
I used one for 3 years, Just put my home port in when I am at the ramp, hit bouys and things on the way out, and fishing spots when I get to them.
They stay stored till you need them.
When its time to go home or spot to spot just hit the goto button enter the number of the point you want to go to and follow the little road.
Not a map ploter but it will get to and from just fine!! Makes a great back up.
Great for hunting also!! put your truck in as a way point, walk as far as you want, then when time to head back to the truck, just hit goto truck and follow the road!!