Just another Moderator
Join Date: Sep 2005
Location: New Westminster, BC
Thanked 499 Times in 473 Posts
Rep Power: 10
The Garmin Map series will do what you want, you need to buy the unit and then the Bluechart CD with charts, and you get the unlock code for one region.
Other brands probably offer similar units.
Of course GPS won't tell you where the traffic and other floating hazards are in fog, so be mindful of that.