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John VanTol

The Importance of Carbon Monoxide Detectors for Boat Owners -Insights from a Detroit Marine Surveyor


One of the most common findings on insurance and pre-purchase surveys is the lack of a carbon monoxide detector installed in a vessel. According to ABYC Standard A-24.6.1, "Carbon monoxide detectors shall be installed on all boats with an enclosed accommodation compartment(s)."


What is defined as an "enclosed accommodation compartment"? Per ABYC 24.4.3, "one contiguous space, surrounded by a permanent structure that contains all of the following:

  1. designated sleeping accommodations,

  2. a galley area with sink, and

  3. a head compartment."


In addition to the lack of an alarm installed, I also often see Xintex Fireboy Power Alarms past their "EOL" (End of Life) date. Approximately five years after the manufacture date, these alarms will begin beeping every 30 seconds. Instead of replacing, many boat owners will disconnect the wiring behind the cover to disable the annoyance of the audible alarm.


Having an alarm installed in your vessel is peace of mind for yourself and your passengers. Carbon monoxide is colorless, odorless and tasteless toxic gas which can quickly overcome a person and be fatal. A common source of carbon monoxide is engine or generator exhaust vapors from your vessel or even another vessel tied up next to you. With the right wind, these vapors can blow carbon monoxide directly into your cabin. Moreover, the signs of carbon monoxide poisoning may closely resemble those of seasickness, including symptoms such as headaches, dizziness, nausea, and vomiting. Something to think about before the 2024 boating season!









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