Hypothermia: Cold Water Kills
Boaters have a greater exposure to the
elements than most and boating in the
cooler weather means a higher risk of
developing hypothermia from wind-chill,
capsize and damp and wet clothes.
Hypothermia is the effect of heat loss
from the body.
Immersion in cold water causes the body
to lose heat up to 25 times faster than
normal and the shock of sudden immersion in
cold water can be a serious threat to
survivors of accidents, especially people
who are older, unfit or under stress from
falling overboard or abandoning ship.
Precautions
Take precautions, always remember:
- The best way to avoid getting
hypothermia is not to put yourself in
the situation where you have an
increased risk of capsize or swamping.
That means checking the weather before
you go, and throughout the voyage. If
in doubt don't go
out.
- To wear warm thermal clothing,
including a beanie and add wet weather
gear over your warm clothes to provide
wind proofing.
- Children and poor swimmers should
wear a lifejacket at all times and this
goes for everyone if conditions get
rough. Wear your lifejacket. This will
keep you afloat if you are forced into
the water.
- Fit buoyancy to your boat to keep
it afloat when capsized. Remain with
your craft - this will increase your
chances of being located quickly after
a capsize or swamping.
- If you are forced into the water,
resist the temptation to swim. Swimming
increases the amount of body heat loss.
It is best to adopt the Heat Escape
Lessening Posture (H.E.L.P) or HUDDLE
position.
- Boaters should be wary of using
gumboots and waders as these make it
difficult to swim should you fall into
the water.
- Alcohol increases the
body's heat loss by
increasing the flow of blood to the
surface areas of the body where it is
quickly dissipated.
- Stay under your designated alcohol
limit.
- For recreational vessel operators
over 18 years the limit is under
.05.
- For commercial vessel operators the
limit is under .02.
- A nil alcohol limit is in force for
recreational vessel operators under 18
years.
Signs of Hypothermia
Immersion in cold water can quickly
affect the brain. This creates a dangerous
situation because a person may not realise
they are in danger.
Obvious signs are:
- intense shivering;
- slurred speech;
- confusion;
- slowing pulse; and
- dilated eye pupils.
Eventually a hypothermic person will lose
consciousness and may drown if not wearing
a type 1 lifejacket.
Treatment of Hypothermia
The aim should be to reduce any further
heat loss and try to commence rewarming
slowly. Consider the following:
- Avoid rough handling and exercising
of the victim;
- Wet clothing should be removed and
dry clothes blankets and other warm
materials applied (body heat can also
be used);
- Remember to warm the person slowly,
never put them close to a fire or in a
hot bath;
- If conscious, give warm drinks
(never alcohol); and
- Commence artificial respiration if
necessary.
Click here for more information on hypothermia in the
Boating Handbook. |