Volvo Penta D11 Operator's Manual download pdf (Page 7)

Carbon monoxide poisoning

When a boat moves forwards, an area of low pressure

air forms behind the boat. In adverse conditions, this

low pressure can be so strong that the boat’s own

exhaust fumes are sucked into the cockpit or cabin,

which entails a risk of carbon monoxide poisoning for

all aboard.

The problem of low-pressure suction is worst in high,

wide boats with a square transom. But even in other

types of boats, low-pressure suction can be a problem

in some conditions, such as if you drive with the hood

up. Other factors which increase the low-pressure

effect are wind conditions, load distribution, pitching,

trimming, open windows and ventilators etc.

Most modern boats are designed so that the problem

of low-pressure suction is very rare, however. If low-

pressure suction does occur anyway, do not open

hatches or ventilators in the forward part of the boat.

Strangely enough, this makes the problem worse. Try

changing speed, trimming or load distribution instead.

Also try taking down/opening the hood or modifying it

in some other manner. Ask your boat dealer for advice

about the best solution for your particular boat.

Remember

• Safety equipment: Life jackets for everybody aboard, communication equipment, emergency

rockets, approved fire extinguisher, first aid kit, life buoy, anchor, paddle, torches etc.

• Spare parts and tools: Impeller, fuel filters, fuses, tape, hose clamps, engine oil, propeller and

tools for the jobs you could be expected to have to do.

• Take your chart out and study your planned route. Calculate distance and fuel consumption.

Listen to weather reports.

• Tell your friends/relatives about route plans if you undertake a long journey. Remember to

notify changed plans or delays.

• Inform everybody aboard about where the safety equipment is located, and how it works. Make

sure that there is more than one person aboard who can start and operate the boat safely.

This list can be extended, since the need for safety equipment varies with the type of boat, and

where or how it is used etc. We recommend that you ask a regional boat or sea safety organization

for more detailed maritime safety information.

Safety Information

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Volvo Penta D11 Operator's Manual Page 7