[ The PDA probably has a GPS function that does them no good if they can't connect to the satellites that tells them where they are in the first place. ]

There's a way to figure it out by the sun in the sky if we know what time it is.

[ Except they don't know that either. What else can they do besides randomly pick a direction and start walking? ]

I could make a mark every now and then with my shuriken... but that'd be vandalism...

[ Heroes don't do property damage. On purpose. They don't want damage fines. Though, could anyone even find them to fine them? ]