effect of his actions on other boats. Of prime concern is
theoperationofanauxiliarygeneratorwithboatsmoored
along side each other. Be aware of the effect your ex-
haust may have on other vessels and be aware that the
operationofothervessel’sequipmentmayaffectthecar-
bon monoxide concentration on your vessel. See Figure
H2.
K. Backdrafting (Station Wagon Effect)
Backdrafting or the “station wagon effect” is caused by
air movement over or around a boat creating a low pres-
sure area of suction area around the stern which can
increase CO level on the boat. Backdrafting can be af-
fected by relative wind direction , boat speed, and boat
trim angle. See Figure H3 Backdrafting - Airflows Over
Boat and Behind Transom”.
FIGUREH4: INEFFICIENTTRIMANGLES.
2.
3.
Excessive or unequally distributed weight.
Canvas Configurations - Under various conditions,
adding or removing canvas may raise or lower CO
levels. See Figures H3, H5 & H6.
4.
Opening and closing ports, hatches, doors, and win-
dows may raise or lower CO levels on board a boat.
See Figures H5 and H6.
FIGURE H2: THEEFFECTOFBOATSMOORED
ALONGSIDE.
FIGUREH5: DESIREDAIRFLOWTHROUGHTHEBOAT.
FIGURE H3: BACKDRAFTING - AIRFLOWS OVER
BOAT AND BEHIND TRANSOM.
Under certain speed and operating conditions the low
pressure area may form in other regions and permit car-
bon monoxide to enter the hull through openings that are
not on the back of the vessel. Boat factors which may
affect CO concentration:
FIGUREH6: THEEFFECTOFCANVASCONFIGURATIONS.
1.
Inefficient trim angle. See Figure H4.
Vista Owners Manual
10/93
Section H
Page 5
| Categories | Four Winns Manuals, Four Winns Vista Manuals, Outboard Marine Corporation Manuals |
|---|---|
| Tags | Four Winns Vista 238, Four Winns Vista 258, Four Winns Vista 278 |
| Model Year | 2000 |
| 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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