US lawFederal (United States)RegulationsTitle 46 CFR — ShippingChapter I — COAST GUARD, DEPARTMENT OF HOMELAND SECURITYPart 188 — GENERAL PROVISIONSSubpart 188.10—Definition of Terms Used in This Subchapter188.10-6146 C.F.R. § 188.10-61Rivers.Last amended: 2016Year: 2026Length: 33 wordsOfficial source Cite as 46 C.F.R. § 188.10-61 (2026)Under this designation shall be included all vessels whose navigation is restricted to rivers and/or canals exclusively, and to such other waters as may be so designated by the Coast Guard District Commander.Previous46 C.F.R. § 188.10-59Next46 C.F.R. § 188.10-65