Magellan is a company with a long history in GPS navigation; they first opened their doors in 1989 with the launch of the first Block II GPS satellites. Since then, they've been providing a wide range of GPS receivers, both for vehicle navigation and for pedestrian travel, on road and off. Today we'll be taking a look at the RoadMate 5175T-LM, a vehicle navigation unit that promises to add a few new twists to the usual formula.