Hypothermia In Water
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Hypothermia is defined as a body core temperature less than 35
Decreased consciousness occurs when the core temperature falls to approximately 32 to 30
Get on top of an over-turned boat
or any wreckage !
Heart failure is the usual cause of death when the core temperature cools to
below 30 degrees.
The body loses heat to the water about 30 times faster than
The positions HELP and HUDDLE are
to reduce body heat loss in water.
Arms close to sides of the chest,
crossed & pulled
up closing the groin area.
In the huddle position, keep close together
and still - to keep
colder water out.
The huddle helps small children survive longer !
Help Search and Rescue crews
Keep calm and
make yourself visible
Carry a WHISTLE with you!
(A Fox 40 is highly
swim or not to swim?
Swimming is an option but this leads to faster heat loss and exhaustion,
even a strong swimmer would not be able to swim more than one kilometre in
Cramp and hypothermia develop more quickly, usually a victim becomes
semiconscious and is likely to drown.
increases heat loss (increase by 35-50%) and is not recommended if you are
more than one kilometer away from shore, adopt a heat conserving
strategy (help or huddle) instead. Consider your circumstances
carefully before deciding to swim, is there a favorable current to assist
Drown proofing and treading water also lead to rapid heat loss, avoid if
possible, wear a PFD! Do not remove clothing or shoes, they provide
insulation (a jacket can trap air and assists floating).
note for divers.
divers who get cold may run out of air faster as shivering increases
demand for air.
Don't panic or you will use up even more air.
a diver ascends too quickly two major problems may arise:
embolism and decompression sickness (bends).
such a victim rapidly to a decompression chamber.
If transporting by air
maintain a low altitude!
in these cases protects against both air embolism and decompression
sickness; re-warm during transportation to a decompression chamber.
to do on land
Through an easy to use visual interface, you will be able to get the latest
windchill values in watts per square meter, or in equivalent temperature
values. The program allows you to calculate the wind chill from the wind
speed (km/h) and temperature (deg. C), or you can convert the watts per
square meter value to an equivalent temperature value.
You should save both files
(childex.exe and childex.hlp)
in the same folder on your computer.
These applications are provided for personal use only by Environment Canada,
(no support provided).
this article in Acrobat (pdf) format
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