| 119.575 |  | 
B | 
CSQ | 
2W6 AWOS-3 | 
AWOS-3 | 
AM | 
Aircraft | 
| 123.000 |  | 
M | 
CSQ | 
CTAF/Unicom | 
CTAF/Unicom | 
AM | 
Aircraft | 
| 122.100 |  | 
M | 
CSQ | 
FSS | 
Flight Service Station (FSS) | 
AM | 
Aircraft | 
| 121.000 |  | 
BM | 
CSQ | 
Pax App/Dep | 
Patuxent Approach/Departure | 
AM | 
Aircraft | 
| 135.625 |  | 
BM | 
CSQ | 
Poto App/Dep | 
Potomac Approach/Departure | 
AM | 
Aircraft |