Patience.
It's not like listening to your local Police or Fire Dispatch
Activity will vary. You might hear lots on One Day or a Whole week, then nothing for days, weeks, months...
Listen, take lots of notes [Tones, Call Signs, Comments made] and then in a month or so, post back what you heard.
Above all - Don't post an active Surv Ops with locations etc. Poor form.
Good luck and best of all, use the SEARCH button
Been scanning these freqs for a few hours, and haven't heard a thing. I'll do some searching of some federal and NY systems to see if I can come up with anything. I know their NY headquarters is in Manhattan.