[pmoriarty]

Not just a camera and communication device, but also a GPS receiver.

It's impossible to overstate how useful GPS is.

That said, one could always get a dedicated GPS device instead of using a phone.

[megous]

> It's impossible to overstate how useful GPS is.

Maps are useful (and I think they're more useful in paper or schematic form optimized to particular use case), but GPS is really just a nice to have.