3824 was the primary Palmetto 800 TG for MUSC MeduCare Helicopter. I am not too sure about the new TG in the 50's. When I was living there there were three air med helo TG's the Palmetto CarForce, MeduCare, and some other one, that I can't remember at this time. I do know that any of the helos operating on the Palmetto 800 could and did switch to iether EMS, or VFD/FD fireground, or primary ops TG's, and also had VHF Hi band and could use that to talk to on scene agencies. They were using the VHF/UHF to talk to some hospitals ER's but in the Charleston area, they switched to the Chas Co. TRS MED TG's for ER talk. The only changes I know of are that the TG for Roper North are not used since that branch closed, and Roper only has two operating hospitals now, Downtown, and Northwoods (which is a advanced clinic). Andddd the only TG I NEVER heard used was the Navy Hospital in North Charleston. The Chas Co. TRS underwent a big time changeover while I was living there, a lot of TG's changed usage, or were abandoned, and new ones popped up. A lot of these changes I submitted to both here when it was still the TRS DB, and to brian's personal site. Ex: The old Folly Beach primary TG which was used for both Fire and Police, became the FD ops, and a new one just for PD ops came into use. And I would consider all of the VFD night TG's as dead. I do know of three other TG's that are in use for Federal agencies in the Low Country, but all three are encrypted, so really what is the use of posting them?