start with fmars (Fire Mutual Aid Radio System) 154.28 and 154.295,
DCFD 154.19,
mgfd 154.16,
AA 154.010,
pg 495.0125 ch.1,494.7375ch.3/5,494.6625 channle 7,
baltimore 46.46,
calvert 33.82,
charles 158.775 and 155.085 channle 2(soon to be discontinued), st.marys 154.98
8)
start with fmars (Fire Mutual Aid Radio System) 154.28 and 154.295,
DCFD 154.19,
mgfd 154.16,
AA 154.010,
pg 495.0125 ch.1,494.7375ch.3/5,494.6625 channle 7,
baltimore 46.46,
calvert 33.82,
charles 158.775 and 155.085 channle 2(soon to be discontinued), st.marys 154.98
8)
From the message, it's a bit hard to judge where he is; but if you're in AA county near BWI, snowplows and other ops personnel use that frequency there. They use a PL of 123.0
'Baltimore' in this context is Baltimore county, of course.
See this page at the Capitol Hill Monitors website:
These are the conventional fire/EMS/emergency services freqs I can hear from my location in Glen Burnie. Omit the initial zero in the freq. It's what my ARC250 program inserts in the program. Of course, there is also the list of fire channels on the many trunked systems in this area but you didn't specify if you had trunking - analog and/or digital - but these should certainly get you going.
0153.9500 Montgomery Co
0154.1600 Montgomery Co
0154.0100 Anne Arundel Co.
0154.3400 Anne Arundel Co.
0854.5875 AA Fire Chat
0154.1000 BWI Airport
0154.2500 Howard Co. Disp
0154.2200 Howard County
0046.4600 Baltimore Co.
0046.2800 Baltimore Co.
0154.4150 Baltimore City
0154.1450 Baltimore City
0154.3850 Baltimore City
0154.3100 Baltimore City
0046.1200 PG County Disp
0495.0125 PG County1 Disp
0494.8375 PG Co2 North Ops
0494.7875 PG Co3 South Fgd
0495.0625 PG Co4 North Fgd
0494.6625 PG Co7 South Ops
0494.8875 PG Co8 PD Patch
0494.9125 PG9 Patch/Laurel
0495.4125 PG Patch/Adelphi
0490.5875 PG11 County TAC
0490.7125 PG12 County TAC
0151.0850 Queen Anne's Co
0151.1300 Queen Anne's Co
0159.0150 Talbot County
0154.1000 Caroline County
0154.9800 St Mary's County
0158.7750 Charles County
0155.0850 Charles County
0155.0550 Carroll County
0153.8450 Frederick County
0460.6000 Harford Co. Disp
0154.1975 Kent County Disp
0155.1675 Kent County Fgd
0153.7700 Kent County Fgd1
0154.1900 York City-PA
0160.1850 ChesterCounty-PA
0159.6000 ChesterCounty-PA
0159.7350 ChesterCounty-PA
0154.2050 Delaware Co-PA
0155.2950 Berks County-PA
0155.0700 Marydel(Kent) DE
0154.4450 Kent County-DE
0154.9650 Wilmington-DE
0154.4000 Blades(Sussex)DE
0155.2200 Cumberland Co-NJ
0154.4300 Cumberland Co-NJ
0155.2050 Ocean County-NJ
0155.1750 Atlantic City-NJ
0154.3250 Pr William Co-VA
0154.1300 Arlington Co-VA
0154.1750 Stafford Co. VA
0460.5750 Fairfax Co. VA
0154.2800 Mutual Aid
0154.2950 Mutual Aid
0154.1900 Washington DC
0044.7400 SYSCOM-Trooper
0047.6600 SYSCOM-Trooper
0155.2650 STATCom-MedEvac
0462.9500 MedSTAR-DC
0155.3550 Life Lion-PA
0155.2350 Life Flight-PA
0160.0200 Life Net-DE
0123.0250 Helo Air/Air
0123.1000 Search & Rescue
0151.4000 Kent County-DE
0157.4500 Farmington-DE
0123.4500 MULTICOM Air/Air
0156.8000 Marine Distress
0156.3000 Intership Safety
0027.0650 CB Channel 9
0154.1900 York-PA
0154.2500 Unk 114.8 PL
0151.0700 Dorchester Co.
0150.9950 Dorchester Co.
0154.1000 Unk PL156.7
0154.3250 Wicomico County
0154.3850 Wicomico County
0463.0000 Med 1
0463.0250 Med 2
0463.0500 Med 3
0463.0750 Med 4
0463.1000 Med 5
0463.1250 Med 6
0463.1500 Med 7
0463.1750 Med 8
0462.9500 Med 9
0462.9750 Med 10