{"data":{"id":"us/33-cfr-150.720","jurisdiction":"us","citation":"33 CFR 150.720","heading":"What are the requirements for sound signals?","body":"The sound signal on each pumping platform complex must be operated whenever the visibility in any horizontal direction from the structure is less than 5 miles. If the platform is under construction, this requirement may be met by the use of a 2-second whistle blast, made every 20 seconds by a vessel moored at the platform.","path":["Title 33—Navigation and Navigable Waters","CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY","SUBCHAPTER NN—DEEPWATER PORTS","PART 150—DEEPWATER PORTS: OPERATIONS","Subpart H—Aids to Navigation"],"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":"b680937723b005607dac4dfb063a0b7731cccf9ecc0002513dd2030131cf8938","source_id":"us-cfr","stale":true,"prev":"us/33-cfr-150.715","next":"us/33-cfr-150.800"},"notice":"GroundRules: Original legal text. Not legal advice."}