{"data":{"id":"us/46-cfr-108.175","jurisdiction":"us","citation":"46 CFR 108.175","heading":"Contiguous locations.","body":"An enclosed space that has direct access to a Division 1 or Division 2 location is the same division as that location, except—\n(a) An enclosed space that has direct access to a Division 1 location is not a hazardous location if—\n(1) The access has self-closing gas-tight doors that form an air lock;\n(2) The ventilation causes greater pressure in the space than in the Division 1 location; and\n(3) Loss of ventilation overpressure activates an alarm at a manned station;\n(b) An enclosed space that has direct access to a Division 1 location can be considered as a Division 2 location if—\n(1) The access has a self-closing, gas-tight door that opens into the space and that has no hold-back device;\n(2) Ventilation causes the air to flow with the door open from the space into the Division 1 location; and\n(3) Loss of ventilation activates an alarm at a manned control station; and\n(c) An enclosed space that has direct access to a Division 2 location is not a hazardous location if—\n(1) The access has a self-closing, gas-tight door that opens into the space and that has no hold-back device;\n(2) Ventilation causes the air to flow with the door open from the space into the Division 2 location; and\n(3) Loss of ventilation activates an alarm at a manned control station.","path":["Title 46—Shipping","CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY","SUBCHAPTER I-A—MOBILE OFFSHORE DRILLING UNITS","PART 108—DESIGN AND EQUIPMENT","Subpart B—Construction and Arrangement"],"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":"9492ef5b05f64f71e8437478031690dfbcc6f9542a5b78623dad956def1bbfa3","source_id":"us-cfr","stale":true,"prev":"us/46-cfr-108.173","next":"us/46-cfr-108.177"},"notice":"GroundRules: Original legal text. Not legal advice."}