> I think the answer to that is quite simple - Spot isn't a navigation tool, you can't see these maps while you are in the backcountry.
Hah! But it IS a nav tool! Last summer, I was lost on (actually OFF) the JMT southbound somewhere south of Devils Postpile. We had seen and followed several very old JMT signs near Crater Meadow.
I realized we were on the wrong trail, but not sure where.
...so, I pulled out my cell phone (Mammoth Mtn was in view), and called my son in MI. He looked up my SPOT location, and told me what trail I was on.