Wearing the right life jacket can be crucial. With new classifications, it is important to know which one you need. Continue reading to learn more about proper life jacket use.
When it comes to personal flotation devices, one size doesn’t fit all. And forget the old U.S. Coast Guard ‘types.’ Here’s what you need to know.
In the 1980s, the U.S. Coast Guard created four wearable life jacket “types” and one throwable flotation “type” for recreational boaters. There is a ton of information about the range of Coast Guard-approved life jackets, but much of this is now out of date. In fall 2014, the Coast Guard announced that, beginning in 2016, life jackets would no longer be categorized by “type.” Newly introduced life jackets are to be classified by “level,” which corresponds approximately to the buoyancy in a measurement unit called Newtons [the force required to cause a mass of one kilogram to accelerate at a rate of one meter/second squared, in the absence of other force-producing effects] provided by the device. These levels closely follow the ISO standard known as ISO 12402; the new North American standard is known as UL 12402. The four consumer-oriented life jacket levels are 50, 70, 100, and 150.
This change has caused a lot of confusion. But the Coast Guard’s goal was to begin the process of “harmonization” between life jackets made to the ISO standard (used in Europe and the rest of the world) and those made to U.S. standards. Ideally, life jackets built to one set of standards with one type of label to describe the life jacket’s attributes could be sold in multiple markets around the world. In theory, this will enable development of products that are more comfortable and have innovative designs and features. Consistent global labeling will also make it easier for consumers worldwide to determine the correct application and size of each life jacket.
While the U.S. transitions from one life jacket standard to another, selecting the right one could be confusing. If you’re unsure whether a life jacket is legal for use on a particular boat, read the label on the life jacket. It should say something like “Legal for all recreational boats.”
What’s A Life Jacket Supposed To Do?
A life jacket prevents you from drowning long enough that you can be plucked from the sea. Although in some rare cases you may be able to self-rescue (by swimming to another boat, the life raft, or the proverbial desert island), you’re much more likely to be rescued by someone else. There are several ways an offshore life jacket increases your chances of survival.
Back to the surface: Initially, a life jacket helps you get back to the surface where you can breathe. The gasp reflex may cause you to try to inhale when your face is immersed in cold water. Added buoyancy is vital to help you get back to the surface. This is the best argument for having a water-activated inflatable life jacket rather than just a manually activated inflatable, because an unintentional cold-water swim can make even the most seasoned boater forget to pull the ripcord.
Hypothermia reduction: An offshore life jacket will help you avoid hypothermia by allowing you to assume the HELP, or Heat Escape Lessening Posture, which can roughly double your cold-water survival time. By clamping your arms to the sides of your chest, clutching the life jacket to reduce water flow, and pulling your legs in toward your chest, you effectively protect high heat-loss areas (head, neck, armpits, and groin). If you try this in a lower buoyancy life jacket, you’ll roll forward, and your face will go in the water.
Maintain upright attitude: Having to use your arms and legs to keep your head above the surface wastes both energy and body warmth. A high buoyancy life jacket should hold you in a semi-reclined position, with sufficient freeboard (mouth height above water) to make breathing relatively easy regardless of sea state.
Heave period: How long will it take you to pop back to the surface after being forced under by a wave? In a low-buoyancy life jacket, there will be long periods of time when your head is immersed, increasing the risk of drowning. High-buoyancy life jackets reduce the heave period so that the swimmer stays on the surface, with adequate freeboard to enable breathing, for a greater percentage of the time. Note: Heave period is related to other life jacket variables besides buoyancy, but there isn’t an easy way to quantify it. When selecting a life jacket, the most relevant variable is buoyancy, which is measured in pound force (lbf) or Newtons.
Survival after losing consciousness: Remarkably, it’s possible to regain consciousness after being so severely hypothermic that you’ve slipped into unconsciousness, as long as your airway has not been compromised. Remember that scene in the movie “Titanic,” where all of the people wearing life jackets appeared to be dead? With the correct rewarming techniques, those passengers could have been saved if they had been removed from the water and given medical treatment.
As of this writing, the UL 12402 standard for life jackets has not yet been finalized. In order to compare the old and new rules for near-shore and offshore applications, we’ve made educated predictions about what the new standards will say.
Offshore life jacket: Formerly known as “Type I” life jackets, these generally use foam for flotation, provide at least 22 lbf (around 100N) buoyancy, and are most commonly used on commercial vessels. Despite adequate in-water performance, they’re not very useful for recreational vessels because their bulky shape restricts mobility. There is a common thought that offshore life jackets are what you want on a larger cruising boat “in case you sink,” but they will not help save you from more common dangers (falling overboard or being ejected from the boat) if they’re not worn.
Near-shore buoyant vest: Formerly known as “Type II” life jackets, these have a minimum buoyancy of 15.5 lbf (around 70N) and the classic “horse collar” shape. The least expensive life jackets, these are intended to meet the letter of the law; they have few other redeeming qualities. For any boating activity, there is a life jacket that will work better than a Type II.
Some non-harness inflatables with water-activated inflation are also considered Type II life jackets, and they can have up to 33.7 lbf (150N) of buoyancy.
Flotation aids: Formerly known as “Type III” life jackets, these also have a minimum of 15.5 lbf (69N) of buoyancy. They’re available in a wide variety of styles and should be selected with the end use in mind. Specialized models have been designed for paddling, sailing, tow sports (like wakeboarding and water skiing), fishing, and so on. The sailboat/powerboat versions are comfortable to wear and provide some degree of hypothermia protection as well as moderate buoyancy. Although they may be appropriate for near-shore, they don’t offer enough flotation to be suitable for offshore use.
Some non-harness manually activated inflatables are also considered Type IIIs. These can have up to 33.7 lbf (150N) of buoyancy. Again, the offshore boater should consider a model with an integral harness.
Throwable device: Formerly known as “Type IV,” now simply a throwable.
Special use device: Formerly known as “Type V” life jackets, this category includes everything that doesn’t fit into the other three. A few special-use devices are useful to either inshore or offshore boaters. The first is the “dinghy”-style vest, which is designed for sailing a small dinghy or keelboat. Many are hard to adjust or have some other features that eliminate them from being categorized as a Type III Flotation Aid. Special use devices also include any inflatable life jacket with a built-in safety harness, because using the harness demands additional training and/or instruction. And certain types of inflators may move their life jackets into this category, even if they are otherwise identical to similar inflatables.
The bottom line is that a life jacket categorized as a “special use device” should not be considered somehow less desirable; it may have exactly the features that you need.
Many special-use devices must be worn to be counted in the vessel’s inventory. If you’re boarded by the Coast Guard and you don’t have that type of life jacket on or some other approved life jacket aboard, you could be subject to fines. To be both legal and safe, wear your life jacket.
Click here to read more about the new life jacket classification system.
Original article published on boatus.com