Tow vehicle- do you use GPS or just a compas and a map ?

Used to teach navigation in Search and Rescue. GPS's are great until they lose a signal, or the batteries die. As with anything else, they're just a tool, and you need to know how to use them.

Another thing we'd do is spread a map on the hood of a car/truck and show the students how a compass would deviate when brought onto the hood, then taken away. The same can be seen on a picnic table in a campground.

Vehicle mounted GPS has definitely come a long way from the Garmin 12XL that I became proficient with.