https://www.google.com/maps/place/41°36'48.6"N+86°52'42.7"W/@41.6126958,-86.8801989,625m/data=!3m1!1e3!4m4!3m3!8m2!3d41.6135052!4d-86.8785222?entry=ttu There is (I think) a 3T22 here in Indiana. It's a scout camp near Michigan City. There is a smaller siren (unknown what it is, it's tiny) ...