I do not have a NXDN capable receiver so someone that does might want to monitor the following to confirm that Sikorsky has switched to the NXDN emission. I have tried DMR and P25 with no joy, so I am assuming it's NXDN.
153.270 Sikorsky Security
151.565 Sikorsky xxx
Bob
153.270 Sikorsky Security
151.565 Sikorsky xxx
Bob