[Ghost of Philip Marlowe]

So what affords protection, mountains, etc? Certainly not the roof of the garage, right?

I’m assuming by line-of-site we mean that electronics protected by structures that, for instance, can block the shock wave of a nuke attack?

[esquirette]

In the book he talks about people on the other side of mountains having electricity, post EMP. Not walls, but mountains and other geographical features provided protection in his scenario.