Sunday, August 12, 2012

Joint Base Charleston

I've been in Charleston, SC for over a week for work, and finally had some time to search around for military activity in the area. I stumbled across something interesting concerning the Naval Support Activity Charleston (NSAC) and their 380 MHz trunked system.

As some may be aware, the US Navy is installing sites for the Enterprise Land Mobile Radio System (ELMRS) trunked radio network at bases across the country and around the world. These P-25 trunked sites can be found in the 380-400 MHz band of DoD controlled radio spectrum. And until now, all the sites of the ELMRS system were in that band.

But apparently now that both NSAC and the Charleston Air Force Base are now one base, called Joint Base Charleston, they made the CAFB 400 MHz trunking system a site on the ELMRS system. This is the first time I have run into a site on the ELMRS system that is NOT in the 380 MHz band. Both sites are using the same System ID of 14C, and both using a P-25 NAC of N140. Neither site shows the other as a neighbor, or any neighbors for that matter, so not sure if any roaming takes place between the two.

Here is what I found active:

System ID             : 14C
System Name           : Enterprise Land Mobile Radio System (ELMRS)
WACN                  : BEE00
Tower Number (Decimal): 206
Tower Number (Hex)    : T0206
Tower Description     : Joint Base Charleston, Naval Support Activity Charleston (NSAC)
Control Capabilities  : Data,Voice,Registration

-Tables
#Format: Table ID,Base Freq,Spacing,Input Offset,Assumed/Confirmed,BandWidth,Slots
00,851.00625,0.00625,-45.00000,"Confirmed",0.00625,1
01,762.00625,0.00625,30.00000,"Confirmed",0.00625,1
02,380.00000,0.00625,10.00000,"Confirmed",0.01250,1
03,406.00000,0.00625,9.00000,"Confirmed",0.01250,1

-Frequencies
#Format: Channel,Usage,Frequency(/Slot),Input Frequency(/Slot),Hit Count
"02-0012","a",380.07500,390.07500,0
"02-0044","c",380.27500,390.27500,0
"02-0068","vd",380.42500,390.42500,337
"02-0092","vd",380.57500,390.57500,297
"02-0116","vd",380.72500,390.72500,318
"02-0150","vd",380.93750,390.93750,314
"02-0162","vd",381.01250,391.01250,306
"02-0188","vd",381.17500,391.17500,331
"02-0198","vd",381.23750,391.23750,343
"02-0210","vd",381.31250,391.31250,301

And here is the Charleston Air Force Base site:

System ID             : 14C
System Name           : Enterprise Land Mobile Radio System (ELMRS)
WACN                  : BEE00
Tower Number (Decimal): 270
Tower Number (Hex)    : T0246
Tower Description     : Joint Base Charleston, Charleston Air Force Base (CAFB)
Control Capabilities  : Data,Voice,Registration

-Tables
#Format: Table ID,Base Freq,Spacing,Input Offset,Assumed/Confirmed,BandWidth,Slots
00,851.00625,0.00625,-45.00000,"Confirmed",0.00625,1
01,762.00625,0.00625,30.00000,"Confirmed",0.00625,1
02,380.00000,0.00625,10.00000,"Confirmed",0.01250,1
03,406.00000,0.00625,9.00000,"Confirmed",0.01250,1

-Frequencies
#Format: Channel,Usage,Frequency(/Slot),Input Frequency(/Slot),Hit Count
"03-0026","vd",406.16250,415.16250,2
"03-0090","d",406.56250,415.56250,0
"03-0122","d",406.76250,415.76250,0
"03-0186","v",407.16250,416.16250,1
"03-0218","c",407.36250,416.36250,0
"03-0250","a",407.56250,416.56250,0
"03-0282","a",407.76250,416.76250,0
"03-0314","a",407.96250,416.96250,0