[Suhiir]

Actually the answer is very, very simple.

When you dig a MG Pit (or any fighting position for that matter) one of the things you do is go out on the enemy side and look and probably actually walk the probable avenues of approach to the position. Back at the position the gunner makes notes (and often marks of some sort) indicating the proper direction to point the weapon to hit that avenue. Thus if anyone attacks during reduced visibility (night, fog, heavy rain) the position can "see" and fire fairly accurately within a couple hundred meters.

So while they don't really "see" via eyeball an MG position can sense and fire on the enemy at 5 hexes.

This help?

I'm sure every person on this forum that ever been in combat arms in any military in the world has seen and done just this more times then they care to remember.