| 118.100 |  | 
 | 
CSQ | 
PDX App/Dep HI  | 
KPDX Approach/Departure High 100-279 | 
AM | 
Aircraft | 
| 120.900 |  | 
 | 
CSQ | 
KTTD TwrVHF/CTAF | 
KTTD Tower VHF/CTAF | 
AM | 
Aircraft | 
| 120.900 |  | 
 | 
CSQ | 
KTTD Twr VHF | 
KTTD Tower VHF | 
AM | 
Aircraft | 
| 121.800 |  | 
 | 
CSQ | 
KTTD Ground | 
KTTD Ground Control | 
AM | 
Aircraft | 
| 122.950 |  | 
 | 
CSQ | 
KTTD Unicom | 
KTTD Unicom | 
AM | 
Aircraft | 
| 124.350 |  | 
 | 
CSQ | 
PDX App/Dep | 
KPDX Approach/Departure 280-099 | 
AM | 
Aircraft | 
| 135.625 |  | 
 | 
CSQ | 
KTTD ATIS | 
KTTD ATIS | 
AM | 
Aircraft | 
| 254.300 |  | 
 | 
 | 
KTTD Twr UHF | 
KTTD Tower UHF | 
AM | 
Aircraft |