In addition to the P25 system pointed out by Mick there are a few other freqs. in use according to the database.
Camp Pendleton Marine Corps Base
Range Control
Callsign: "Long Rifle"
Frequency Type Alpha Tag Description Mode Tag
49.00000 BM Ground Primary FM Military
30.35000 BM Ground Alternate FM Military
123.20000 M Air Primary / Range Control (LongRifle) AM Military
301.90000 M Air Primary / Range Control (LongRifle) AM Military
249.90000 M Air Tactical (UHF) AM Military
255.20000 M Air Tactical (UHF) AM Military
Fire/EMS
Frequency Input
Type Tone Alpha Tag Description Mode Tag
140.50000 M 167.9 PL 1 Secondary Talkaround FM Fire-Talk
140.50000 138.80000 RM 167.9 PL 2 Secondary FM Fire-Talk
138.60000 M 167.9 PL 3 Primary Talkaround FM Fire-Talk
138.60000 140.92500 RM 167.9 PL 4 Primary FM Fire-Talk
ATC
Frequency Type Alpha Tag Description Mode Tag
126.20000 BM Clearance/Del AM Aircraft
127.30000 BM Approach/Departure AM Aircraft
128.45000 BM Approach/Departure AM Aircraft
128.77500 BM Tower/Ground AM Aircraft
236.30000 BM Approach/Departure AM Aircraft
265.00000 BM Base Operations AM Aircraft
267.60000 BM ATIS AM Aircraft
323.00000 BM Approach/Departure AM Aircraft
340.20000 BM Tower / Clearance/Del AM Aircraft
360.20000 BM Ground AM Aircraft
382.20000 BM Tower AM Aircraft