MOTC Manual - edited

Bilge-Dewatering System – The simplest bilges are in open
boats and have a single bilge plug; dewatering can be
accomplished using a bucket, manual pump, or by removing the
plug while operating at minimum planing speed. Boats that are
moored need at least one automatic bilge pump, and should
have a separate switch that allows the auto-bilge to operate
when all other systems are turned off by the master switch.
Some boats, especially those used in heavy-weather conditions
or for running rivers, are equipped with an automatic and a
manual bilge pump.
Keep the bilge clean so that any new leaks (e.g., oil or antifreeze) can be detected
quickly.
Anti-Corrosion System – Outboard motors and metal boat hulls have sacrificial anodes
attached to reduce corrosion on critical parts. Anodes are traditionally made of zinc, and
should be replaced when they have eroded to about 50% of their initial size.
Carbon Monoxide Poisoning – Carbon monoxide (CO) is a colorless,
odorless, and tasteless gas known as the "silent killer". It is produced
when a carbon-based fuel — such as gasoline, propane, charcoal, or oil
— burns. Sources on your boat may include motors, gas generators,
cooking ranges, space heaters and water heaters.
Carbon monoxide (CO) enters your bloodstream through the lungs,
blocking the oxygen your body needs.
Prolonged exposure to low concentrations or very quick
exposure to high concentrations of CO can kill you. It is
important to know the early symptoms of CO poisoning.
Early symptoms of CO poisoning include irritated eyes, headache, nausea, weakness, and
dizziness. These symptoms are often confused with seasickness or intoxication, so those
affected may not receive the medical attention they need.
How CO can accumulate?
Inadequately ventilated canvas enclosures
Exhaust gas trapped in enclosed places
Blocked exhaust outlets
Another vessel’s exhaust
“Station wagon effect” or back drafting.
At slow speeds, while idling, or stopped.
Be aware that CO can remain in or around
your boat at dangerous levels even if your
engine or the other boat’s engine is no
longer running.
How can you protect others and yourself?
Know where and how CO may accumulate in and around your boat.
If you can smell engine exhaust, you are inhaling CO.
DOI – Motorboat Operator Certification Course Chapter 2 – 12