Frequencies
Downstate
Mississippi River
Commercial traffic uses Marine Ch 13 while recreational uses Ch 9. Ch. 16 is a hailing channel.
For more see Database and American Boating Association. US Army Corp of Engineers control the lock and dams
Chicago Area Marine
Marine
| Frequency | License | Type | Tone | Alpha Tag | Description | Mode | Tag |
|---|---|---|---|---|---|---|---|
| 156.450 | BM | CSQ | Marine Ch-09 | Lake Michigan Calling Channel | FM | Transportation | |
| 156.550 | BM | CSQ | Marine Ch-11 | Chicago Locks Navigation Alt | FM | Transportation | |
| 156.600 | BM | CSQ | Marine Ch-12 | Chicago Bridge Operations | FM | Transportation | |
| 156.650 | BM | CSQ | Marine Ch-13 | Chicago Locks Navigation | FM | Transportation | |
| 156.700 | BM | CSQ | Marine Ch-14 | Chicago Locks Operations | FM | Transportation | |
| 156.800 | BM | CSQ | Marine Ch-16 | Marine Emergency | FM | Transportation |