Volvo Penta D3 Operator's Manual page 7

Carbon monoxide poisoning
When a boat moves forward an area of lower air pres-
sure is formed behind the boat, so-called turbulence.
In certain conditions, this turbulence can be powerful
enough to draw the boat's own exhaust fumes into the
cockpit or cabin, with the risk of carbon monoxide poi-
soning to those on board.
The turbulence problem is most pronounced on tall,
broad-beamed boats with a transom stern. But even
on other types of boats turbulence can be a problem
in certain circumstances, e.g. under way with cockpit
awnings rigged. Other factors that can increase the
effect of turbulence are wind conditions, load distri-
bution, swell, trim, open hatches and ventilators etc.
Remember
• Safety equipment: Life jackets for everyone on board, communications equipment, distress
rockets, fire extinguishers, first aid kit, life buoy, anchor, paddles, flashlights etc.
• Spare parts and tools: Impeller, fuel filter, fuses, tape, hose clamps, engine oil, propeller and
tools for those jobs you might conceivably be forced to do.
• Take out the charts and study the planned course. Calculate the distance and the fuel con-
sumption. Listen to the weather forecasts.
• Inform your relatives about your trip planning for longer voyages. Remember to inform of
changed plans or delays.
• Inform those on board of the location of safety equipment and explain how it is used. Ensure
that more than one person on board can start and drive the boat in a safe manner.
The list will need to be complemented as safety equipment requirements vary depending on boat
type and how and where it is used etc. We recommend that you contact a regional boat association
or maritime safety organization for more detailed maritime safety information.
47705992 05-2015 © AB VOLVO PENTA
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Most modern boats are however designed so that the
turbulence problem is very rare. Should turbulence
nevertheless occur, forward hatches and ventilators
must not be opened. Strangely enough this will exac-
erbate the problem. Try instead changing the speed,
trim or load distribution. Also try taking down or open-
ing or in some other way changing the cockpit awning
configuration. Contact your boat dealer for the best
solution for your boat.
Safety Information
5