> "A single 1-kW jammer can take down GPS for a 300-nm radius." This is one of those occasions when capitalisation really matters: "nm" (lowercase) is nanomete

> "A single 1-kW jammer can take down GPS for a 300-nm radius." This is one of those occasions when capitalisation really matters: "nm" (lowercase) is nanometer, the tiniest of scales. On the other hand, "NM" (uppercase) is nautical miles, used in aviation (because aviation is stuck in the age of sail, and measures distance in boat miles and speeds in boat miles per hour) All Aviation literature will tell you to never spell it lowercase, and this is why. There's a lot of physics in aviation, and it's too easy to misread things. Always get your units right.