[Code of Federal Regulations] [Title 33, Volume 2] [Revised as of July 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 33CFR161.21] [Page 567] TITLE 33--NAVIGATION AND NAVIGABLE WATERS CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) PART 161--VESSEL TRAFFIC MANAGEMENT--Table of Contents Subpart B--Vessel Movement Reporting System Sec. 161.21 Sailing Plan Deviation Report (DR). A vessel must report: (a) When its ETA to a destination varies significantly from a previously reported ETA; (b) Any intention to deviate from a VTS issued measure or vessel traffic routing system; or (c) Any significant deviation from previously reported information.