{"operation":"document","citation":"49 CFR 176.176","title":"Signals.","source_type":"regulation","agency":"Pipeline and Hazardous Materials Safety Administration","status":"current","official":true,"published_on":null,"effective_on":"2026-08-18","summary":"When Class 1 (explosive) materials are being loaded, handled, or unloaded on a vessel, the vessel must exhibit the following signals:\n\n(a) By day, flag “B” (Bravo) of the international code of signals; and\n\n(b) By night, an all-round fixed red light.","machine_formats":{"json":"https://regulus.evalyn.ai/document/49-cfr-176-176.json","markdown":"https://regulus.evalyn.ai/document/49-cfr-176-176.md"},"app_url":"https://regulus.evalyn.ai/document/49-cfr-176-176","source_url":"https://www.ecfr.gov/on/2026-08-18/title-49/section-176.176","body":"When Class 1 (explosive) materials are being loaded, handled, or unloaded on a vessel, the vessel must exhibit the following signals:\n\n(a) By day, flag “B” (Bravo) of the international code of signals; and\n\n(b) By night, an all-round fixed red light.","truncated":false,"body_characters":250}