CFR›Title 33›Chapter I›Part 161›Subpart A ContainsSubject groups General Rules–Services, VTS Measures, and Operating RequirementsCorpusDaily eCFRDisplayed edition2026-05-08Last updated2026-05-08 Subpart A—Vessel Traffic Services Subject Groups General Rules General Rules Sections 161.1–161.6 Services, VTS Measures, and Operating Requirements Services, VTS Measures, and Operating Requirements Sections 161.10–161.13 Next B Subpart B—Vessel Movement Reporting System