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Personal flotation devices being worn on a navy transport . A personal flotation device (PFD; also referred to as a life jacket, life preserver, life belt, Mae West, life vest, life saver, cork jacket, buoyancy aid or flotation suit) is a flotation device in the form of a vest or suit that is worn by a user to prevent the wearer from drowning in a body of water.
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The United States Coast Guard promotes using life vests to protect against hypothermia through the 50/50/50 rule: If someone is in 10 °C (50 °F) water for 50 minutes, they have a 50 percent better chance of survival if they are wearing a life jacket. [60] A heat escape lessening position can be used to increase survival in cold water.
The operations manual can be a digital or paper document. Digital format has advantages for revision control and can be distributed easily and at low cost. [4] The detail should be sufficient to allow a competent person without specific experience to understand what is needed and how it is to be done.
A Posey vest is a type of medical restraint used to restrain a patient to a bed or chair. [1] Its name comes from the J.T. Posey Company , its inventor, though the term "Posey" is used generically to describe all such devices. [ 2 ]
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As secondary component of the IIFS the ammunition carrying vest (vest, ammunition carrying [NSN 8415-01-317-1622]) is intended for use by the infantry rifleman (grenadier), armed with either the M203 or M79 grenade launcher. It is constructed of a seven-ounce nylon fabric printed in the woodland camouflage pattern and weighs 2.1 pounds empty.
The primary outcome of the VEST-study, arrhythmic mortality, was 1.6% in the WCD group vs. 2.4% in the control group. The difference was not significant despite a 33% relative risk reduction (RRR). The secondary outcome of the VEST-study, all-cause mortality, was 3.1% in the WCD group and 4.9% in the control group.