Illinois Captain's License Requirements (2026)

What a “Illinois captain's license” actually means#

It isn't a state license — it's the same federal USCG Merchant Mariner Credential with an OUPV or Master endorsement, used nationwide.

Credential issuer

USCG National Maritime Center.

Nearest exam route

REC Toledo, OH / St. Louis, MO.

Local route clue

Six-passenger operators on the Great Lakes around Chicago Lakefront need the Great Lakes and Inland OUPV route (or a qualifying Near-Coastal endorsement), then compare Master 50/100 for larger inspected boats.

Which Rules of the Road apply on Illinois water#

Illinois is the clearest case in the country of one state holding both inland regimes, and 33 CFR 83.03(o) draws the boundary between them inside Chicago: the Great Lakes definition reaches up the Calumet River as far as the Thomas J. O'Brien Lock and up the Chicago River as far as the east side of the Ashland Avenue Bridge. East of those points a vessel is on Great Lakes water; the Illinois, Mississippi and Ohio Rivers downstate are Western Rivers under 83.03(n). Rules 9(a)(ii), 14(d) and 15(b) happen to read the same for both, but the towing-light exception at 83.24(j) is Western Rivers only, and the all-round white light in lieu of a second masthead light at 83.23(e) is Great Lakes only. Credential-wise the split matters more: 46 CFR 11.467(b) says an inland-waters OUPV covers all inland waters EXCEPT the Great Lakes, so Chicago lakefront work needs the Great Lakes and inland endorsement.

33 CFR Part 80 draws no demarcation line in Illinois. Its 106 sections cover the Atlantic, Gulf and Pacific coasts, Puerto Rico and the Virgin Islands, the Pacific islands and Alaska; a state with no coast has no section, which is itself the answer.

Great Lakes water (Lake Michigan) needs no Part 80 line: 33 CFR 83.03(q) defines inland waters to include the waters of the Great Lakes on the United States side of the International Boundary. Under 46 CFR 11.467(b) a plain inland OUPV endorsement covers all inland waters except the Great Lakes.

Western Rivers (the Mississippi, Illinois and Ohio Rivers) are defined at 33 CFR 83.03(n) and carry Inland Rules provisions the rest of inland water does not: 83.09(a)(ii), 83.14(d), 83.15(b) and the towing-light exception at 83.24(j).

This decides which rulebook you steer by, not where your credential may operate: the route limit is the 46 CFR Part 7 Boundary Line, and the two lines are not drawn in the same place. How the two lines differ · International Rules · Inland Rules

33 CFR Part 80 and the Part 83 definitions above read from eCFR on 12 Aug 2026. Any specific water is a determination for the cognizant Coast Guard Officer in Charge, Marine Inspection.

Which credential do Illinois charter captains need?#

Not sure the trip needs a credential at all? The captain's-license trigger guide.

Credentials charter captains pursue in Illinois

• OUPV Great Lakes & Inland (Six-Pack) — authorizes six-passenger work on the Great Lakes and inland waters after 12 months of service, including at least 3 months operating vessels on Great Lakes waters.
• OUPV Inland (Six-Pack) — operates uninspected <=6-passenger charter boats on inland waters other than the Great Lakes — bays, sounds, inland lakes, and rivers.
• Master 50 GT — mid-tier inspected-vessel master — typical for charter sport-fish operations under 50 gross tons.
• Master 100 GT — full inspected-vessel master up to 100 GT — required for larger charter and tour vessels.