GPS technology properly understood can be very useful and its utility exceeds the utility of the map and compass in blinding conditions. I carry a GPS and a topo map and compass wherever I hike. I have learned to use my GPS well enough that I have come to rely heavily on it. I have a model with extremely good reception and it gives very reliable directions. In fact, I primarily use the GPS. As a fail safe, I use and carry a map and compass. I understand that the following scenario is not likely, but it happens: If one were in blinding conditions and because of an emergency (let's say someone back on the trail needs acute care quickly) one needs to navigate through the blinding storm, the compass will function but without being able to sight landmarks, the map will be of no use making the compass of very little use. A good GPS in the hands of someone who has spent the time to understand how it works, on the other hand, could guide the traveler to where they needed to go.
Brent N
