David Fletcher requests help from members for some new research.
Last time, I talked about the new BSS requirements for carbon monoxide alarms and the issues with ventilation. I explained that there is a good deal that we do not understand about ventilation and air changes in boat cabins.
A major new study is planned for boaters in London, looking at CO levels, particularly the low levels that come from sources such as gas cooking or wind-carried exhausts from adjacent boats. CO measuring and logging devices will be placed in many boats, so that both high and low levels of CO can be detected. The study is to find out the extent of these low levels, typically 1-10ppm, whereas alarms go off at 50ppm. The data-loggers are simple, battery operated devices that plug into a usb port on a laptop, and can be interrogated with special software. The recording device will produce a graph of the readings over time, showing the extent and frequency of spikes, but of course it doesn’t show or record where the spike comes from. This second part is much more problematic; to relate peaks or high levels to actual events or causes.