“A dead zone is simply an area within your house, apartment, office, or any other area that's supposed to be covered by Wi-Fi. When you try to connect, however, your device registers no signal.”

“This meant that if the sides of the fort were angled at 72°, the risk of an enemy being able to find a dead zone at the corner of the fort was reduced, as the vulnerable area of frontage was limited to 12°.”