Officially, NM is the abbreviation for nautical miles when used in the context of aircraft operations. It’s not just a good idea, it’s the Law. Specifically, 14

Officially, NM is the abbreviation for nautical miles when used in the context of aircraft operations. It’s not just a good idea, it’s the Law. Specifically, 14 CFR Part 1.2 of the United States Code of Federal Regulations. https://www.ecfr.gov/current/title-14/chapter-I/subchapter-A/part-1 https://www.ecfr.gov/current/title-14/chapter-I/subchapter-A...