West Virginia's navigable water is river water: the Ohio along the western border and the Kanawha through Charleston are inside the 33 CFR 83.03(n) Western Rivers definition, and no Part 80 demarcation line is drawn in the state. That puts the four river-specific provisions in force on the commercial reaches — 83.09(a)(ii), 83.14(d), 83.15(b) and the towing-light exception at 83.24(j) — which is the material an inland Rules of the Road module will examine. Summersville Lake and the Greenbrier are a different case: they are inland water under 83.03(q) with the plain Inland Rules applying, and whether they are navigable water of the United States for credentialing purposes is an OCMI determination. West Virginia candidates test at REC Memphis.
33 CFR Part 80 draws no demarcation line in West Virginia. 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.
Western Rivers (the Ohio and Kanawha 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.