{"data":{"id":"us/46-cfr-197.458","jurisdiction":"us","citation":"46 CFR 197.458","heading":"Gages and timekeeping devices.","body":"The diving supervisor shall insure that—\n(a) Each depth gage and timekeeping device is tested or calibrated against a master reference gage or time-keeping device every 6 months;\n(b) A depth gage is tested when a discrepancy exists in a depth gage reading greater than 2 percent of full scale between any two gages of similar range and calibration;\n(c) A timekeeping device is tested when a discrepancy exists in a timekeeping device reading greater than one-quarter of a minute in a 4-hour period between any two timekeeping devices; and\n(d) Each depth gage and timekeeping device is inspected before diving operations are begun.","path":["Title 46—Shipping","CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY","SUBCHAPTER V—MARINE OCCUPATIONAL SAFETY AND HEALTH STANDARDS","PART 197—GENERAL PROVISIONS","Subpart B—Commercial Diving Operations"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-46.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:22Z","sha256":"72c9bac33e87855dfc0867f7e9bda24d13681bc122e2cafa46a2035413ca1999","source_id":"us-cfr","stale":true,"prev":"us/46-cfr-197.456","next":"us/46-cfr-197.460"},"notice":"GroundRules: Original legal text. Not legal advice."}