{"data":{"id":"us/46-cfr-143.230","jurisdiction":"us","citation":"46 CFR 143.230","heading":"Alarms and monitoring.","body":"(a) Each towing vessel must have a reliable means to provide notification when an emergency condition exists or an essential system develops problems that require attention. The following alarms must be provided:\n(1) Main engine low lubricating oil pressure;\n(2) Main engine high cooling water temperature;\n(3) Auxiliary generator engine low lubricating oil pressure;\n(4) Auxiliary generator engine high cooling water temperature;\n(5) High bilge levels;\n(6) Low hydraulic steering fluid levels, if applicable; and\n(7) Low fuel level, if fitted with a day tank.\n(b) Alarms must:\n(1) Be visible and audible at each operating station. The alarm located at the operating station may be a summary alarm; if the alarm at the operating station is a summary alarm, the specific alarm condition must be indicated at the machinery or bilge location;\n(2) Have a means to test actuation at each operating station or have a continuous self-monitoring alarm system which actuates if an alarm point fails or becomes disabled;\n(3) Continue until they are acknowledged; and\n(4) Not interfere with night vision at the operating station.\n(c) The following systems must be equipped with gauges at the machinery location:\n(1) Main engine lubricating oil pressure and main engine RPM;\n(2) Main engine cooling water temperature;\n(3) Auxiliary generator engine lubricating oil pressure and auxiliary generator engine RPM;\n(4) Auxiliary generator engine cooling water temperature; and\n(5) Hydraulic steering fluid pressure, if the vessel is equipped with hydraulic steering systems.","path":["Title 46—Shipping","CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY","SUBCHAPTER M—TOWING VESSELS","PART 143—MACHINERY AND ELECTRICAL SYSTEMS AND EQUIPMENT","Subpart B—Requirements for All Towing Vessels"],"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":"d48e9daf6de4d0b6287cd87ff053f00c03cf7761e8e438796ab666eb178bd532","source_id":"us-cfr","stale":true,"prev":"us/46-cfr-143.225","next":"us/46-cfr-143.235"},"notice":"GroundRules: Original legal text. Not legal advice."}