Interesting history… State plane, maybe?
GRY= New York State Police, call sign Gray Rider.
Source: FAA Contractions publication
Thanks. Bookmarked 'em all for future reference…
Sorry about the duplicate entries. Internet problems 
Move along…There’s nothing to see here…
Lol… figure Big Dave was in DC for the Christmas Party…
Naaaah, that’s where the hookers and the cocaine are.