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SPECIAL SAFETY MESSAGES
Boat houses, seawalls, and other boats in close proximity or confined areas can contribute to
increased CO levels. Operators must be aware that operation, mooring, and anchoring in an
area with other boats puts them in jeopardy of CO accumulation from other sources. Likewise,
a boat operator must be aware of how exhaust from his boat will affect others. Operation of
the engines while moored may cause CO accumulation in your boat and those around you.
Be sure to provide adequate ventilation. If the windshield has vents, open them before getting
underway to increase positive air flow and decrease the chances of CO accumulation.
While underway, CO concentrations can increase by backdrafting or “the station wagon ef-
fect”. Backdrafting is caused by factors such as relative wind direction, speed, or the bow be-
ing too high. To prevent this, open canvas whenever possible to provide positive airflow
through the hull.
WARNING
Engine exhaust fumes contain carbon monoxide (CO) which can accumulate in and
around the boat (under bimini top, in cockpit, etc.). CO can be harmful or fatal if
inhaled. Assure there is adequate ventilation whenever running engine(s).
B00060
WARNING
Backdrafting! Under certain conditions, moving air currents can direct poisonous CO
fumes into boat. These fumes can accumulate to dangerous levels without proper air-
flow. Provide adequate ventilation, redistribute the load or bring boat out of high bow
angle.
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