{"data":{"id":"us/33-cfr-64.06","jurisdiction":"us","citation":"33 CFR 64.06","heading":"Definition of terms.","body":"As used in this part:\nHazard to navigation means an obstruction, usually sunken, that presents sufficient danger to navigation so as to require expeditious, affirmative action such as marking, removal, or redefinition of a designated waterway to provide for navigational safety.\nHigh seas means those waters described in § 2.32(c) of this chapter.\nMarkings means the lights and other signals placed on or near structures, sunken vessels, and other obstructions for the protection of navigation.\nNavigable waters of the United States means those waters described in § 2.36(a) of this chapter, specifically including the waters described in § 2.22(a)(2) of this chapter.\nObstruction means anything that restricts, endangers, or interferes with navigation.\nStructures means any fixed or floating obstruction, intentionally placed in the water, which may interfere with or restrict marine navigation.","path":["Title 33—Navigation and Navigable Waters","CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY","SUBCHAPTER C—AIDS TO NAVIGATION","PART 64—MARKING OF STRUCTURES, SUNKEN VESSELS AND OTHER OBSTRUCTIONS","Subpart A—General"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-33.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:25:35Z","sha256":"a765a45709e48015dbd3e0730f5e6ab4f39996d7e2cc80cf2d81049295cb2753","source_id":"us-cfr","stale":true,"prev":"us/33-cfr-64.03","next":"us/33-cfr-64.11"},"notice":"GroundRules: Original legal text. Not legal advice."}