What letter must appear at the beginning of the registration number of all non-military aircraft in the U.S.?
Ⓝ 🅽 ⒩ 🄽 ⓝ N (letter) Ｎ 🄝 N 🅝 En (letter)
🅽 n letter 🄽 ⒩ n en letter ⓝ ｎ 🅝 🄝
n
WikipediaEntity
N