Carbon Monoxide 

Carbon monoxide poisoning can be caused by any fuel burning device that is not correctly set up and flued, such as diesel cabin heaters or petrol generators.

If such a deadly device is on when boaters are sleeping at night, the often fatal poisoning will occur gradually during sleep with no warning or chance of waking. It is an ever present risk for live aboard boaters, both inland and coastal.

The BSS (Boat Safety scheme) has placed urgent advice on its website following two incidents in the last half of 2006 leaving two boaters dead and a couple hospitalised from suspected carbon monoxide (CO) poisoning.

BSS Manager, Graham Watts said:
"These incidents send a clear message to others about the peril of ignoring the silent threat of CO. Boaters need to be vigilant and recognise the early signs of being poisoned including headaches, tiredness, difficulty in thinking clearly and feeling sick. If the early signs stop after you leave the boat, take action. If you think you are suffering, seek medical help straight away and tell the doctor or nurse of your symptoms with a possible link to CO.

"Stop using any appliance that is causing CO and fix it as soon as possible. Turn off any engine pumping fumes into your space and move it to place when it can run safely. He urged."

Exhaust fumes, particularly from petrol engines such as the boat's motor or from a portable generator are a prime source. Don't allow any exhaust fumes in the cabin or accommodation spaces, in particular, keep generators well away from cabin openings.

The other general risk is from carbon fuel burning appliances LPG fuelled appliances, solid fuel stoves, and similar items. All need correct installation, routine maintenance and the right conditions to support efficient combustion, as toxic fumes are caused by poor burning. So make sure your flues are in good condition and check any flues terminals are not damaged or blocked. You also need to ensure there is an adequate supply of oxygen, so never restrict the airflow by blocking cabin vents and air-gaps.

For more detail on how to avoid CO happening and what to do if it does, read Avoiding the Silent Threat leaflet from the BSS and for further checks to help stay safe read the Scheme's Essential Guide (2005) on www.boatsafetyscheme.com or buy a copy by calling  01923 201278 .