[Code of Federal Regulations] [Title 33, Volume 3] [Revised as of July 1, 2007] From the U.S. Government Printing Office via GPO Access [CITE: 33CFR401.46] [Page 673] TITLE 33--NAVIGATION AND NAVIGABLE WATERS CHAPTER IV--SAINT LAWRENCE SEAWAY DEVELOPMENT CORPORATION, DEPARTMENT OF TRANSPORTATION PART 401_SEAWAY REGULATIONS AND RULES--Table of Contents Subpart A_Regulations Sec. 401.46 Attending lines. (a) Lines of a vessel shall be under visual control and attended by members of its crew during the time the vessel is passing through a lock. (b) While a vessel is within a lock chamber and lines are hand held for tension control, each line shall be attended by at least one member of the vessel's crew.