Marine Operations (Illinois) Scanner Frequencies and Radio Frequency Reference

Marine Operations (Illinois)

Last Updated: July 11, 2025, 00:19 am UTC

Frequencies

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Downstate

Mississippi River

Mississippi River - Commercial river traffic uses Marine Ch. 13, recreational uses Ch 9 and. Ch. 16 is a hailing channel.
For more, see Maritime Database and American Boating Association. US Army Corp of Engineers control the locks and dams

Chicago Area Marine

Marine

Frequency	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