Captain Pedant here, although this is hardly a matter of high pedantry. 12 nm would be 12 nanometres, which is really rather closer to the coast than I personally want belligerent Russians to be flying. I believe the correct symbol for nautical miles, which I assume you intended, to be "NM", although wikipedia states "M, NM, or nmi" are valid; not however simply "nm".
Fresh from the desk of Dr. Proktophantasmist:
Definition of nm
1 nanometer
2 nautical mile
Source: Merriam-Webster
Biting the hand that feeds IT
