HH-60M Blackhawk with unusual callsign ON near Helena Montana.

Hex AE5AEC tail 15-20778

Is something on?

>>13010215

Yep, 10pm UK time 5 pm eastern

>>13010209

Helo callsignONhas dropped off ADSB.

>>13010256

Odd callsign ON popped up and almost as soon as I posted it dropped off. Spoopy.

>>13010390

Big Ugly is nickname for B-52 bomber.

March is also an airbase.