J. The Effect of Boats Moored Along Side
2. Excessive or unequally distributed weight.
A boat operator should be aware that carbon monox-
ide is emitted from any boat’s exhaust. The operation,
mooring, and anchoring in an area containing other
boats may be in an atmosphere containing CO not of
the operator’s making. An operator likewise needs to
be aware of the effect of their boat on other boats in
the area. Of prime concern is the operation of an
auxiliary generator where boats are moored along
side each other. Be aware of the effect your exhaust
may have on other boats and be aware that the
operation of other boats’ equipment may affect the
carbon monoxide concentration on your boat.
See Figure B7.
Figure B-9: Inefficient trim angles
3. C an vas c onfi gur at i ons – Un der var i ous c on dit i o ns,
adding or removing canvas may raise or lower CO
levels. See Figures B-8, B-9 & B-11.
EXHAUST FUMES!
Hull exhaust from your boat can cause
excessive accumulation of poisonous carbon
monoxide gas within cockpit areas when using
protective weather coverings (while underway
or while stationary). Provide adequate ventila-
tion when the canvas top, side curtains and/or
back (aft) curtains are in their closed protective
positions.
Figure B-7: The effect of boats moored along side
K. Backdrafting (Station Wagon Effect)
Backdrafting or the “station wagon effect” is caused
by air movement over or around a boat creating a low
pressure area or suction area around the stern that
can increase CO level on the boat. Backdrafting can
be affected by relative wind direction, boat speed,
and boat trim angle. See Figure B-8 Backdrafting –
Airflows Over Boat and Behind Transom”.
4. Opening and closing ports, hatches, doors, and
windows may raise or lower CO levels on board
a boat. When airflow is moving forward inside the
boat, CO may be entering the boat. See Figures
B-10 and B-11.
Figure B-10: Desired air flow through the boat
Figure B-8: Backdrafting - Air flows over boat
and behind transom
Under certain speed and operating conditions, the low
pressure area may form in other regions and permit
carbon monoxide to enter the hull through openings
that are not on the back of the boat. Boat factors
which may affect CO concentration:
Figure B-11: The effect of canvas configurations
1
. Intentional or unintentional excessive trim angle
causing high bow angle. See Figure B-9.
5. Operating a boat at slow speeds with a following
wind should be avoided. Consider changing direc-
tion, adjusting speed, or both. See Figure
B-12.
Boating Safety - Section B
Owner’s Manual Page 31
| Categories | Four Winns H-Series Manuals, Four Winns Manuals |
|---|---|
| Tags | Four Winns H |
| Model Year | 2011 |
| Download File |
|
| Document Type | Owner's Manual |
| Language | English |
| Product Brand | Boats and Cruisers, Four Winns. For support contact your dealer at http://www.fourwinns.com/locate-dealer.aspx |
| Document File Type | |
| Publisher | fourwinns.com |
| Wikipedia's Page | Outboard Marine Corporation |
| Copyright | Attribution Non-commercial |
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