Summer is fast approaching and so is the season for drowning deaths and near drowning incidents of West Australian children.
Homeowners need to check now to make ensure that pool barriers comply with Australian Standards and current state regulations. Make sure fences are secure and gates self close and securely latch. Very importantly ensure there is nothing leaning up against the fence or able to dragged over to the fence and used as a step ladder. These are your kids, they are just like you, cunning and smart!
Make sure this summer (and every summer actually) that all children, your own and those of visitors to your home are supervised when in and around water. If you are holding a party and your home has a pool ensure it is securely locked, or, if you plan to use your pool ensure a qualified / competent adult that knows CPR is on duty in the pool area at all times. If you prefer, West Coast Water Safety can provide nationally qualified lifeguards, with Working with Children (WWC) and National Police Clearance, that will not only watch your pool for you but actually get in the water with the kids and entertain them. Imagine that a pool party where all you have to do is entertain the adult guests and relax. Leave the kids and water safety to us!
Children under 5 years of age are the most at risk of drowning. Between 1995 and 1999, 50 children under the age of 14 years drowned in Western Australia, about half of these were under 5 years age. For the same period, 247 children were admitted to WA hospitals after an immersion incident or near drowning.
Maybe you need to think about hiring a professional Lifeguard for the duration of your party. Crazy? Not really, imagine the medical bills, $900+ for the ambulance alone. How much is a life worth?
Need a lifeguard? Let me know and I will arrange it all for you.
Minimise the risk, make sure no one drowns in your pool and make this a good summer for all of us.
Professional Lifeguard West Coast Water Safety www.wcws.com.au
BLUE-BOTTLES: The Portuguese man o’ war (Blue Bottle) is composed of three types of medusoids (gonophores, siphosomal nectophores, and vestigial siphosomal nectophores) and four types of polypoids (free gastrozooids, gastrozooids with tentacles, gonozooids, and gonopalpons), grouped into cormidia beneath the pneumatophore, a sail shaped structure filled with gas.The pneumatophore should probably not be considered a polyp, as it develops from the planula, unlike the other polyps. This sail is bilaterally symmetrical, with the tentacles at one end. It is translucent, and is tinged blue, purple, pink, or mauve. It may be 9 to 30 cm (3.5 to 11.8 in) long and may extend as much as 15 cm (5.9 in) above the water. The sail is equipped with a siphon. In the event of a surface attack, the sail can be deflated, allowing the organism to briefly submerge.
The other three polyp types are known as dactylozooid (defense), gonozooid (reproduction), and gastrozooid (feeding). These polyps are clustered. The dactylzooids make up the tentacles that are typically 10 m (33 ft) in length, but can reach over 30 m (98 ft). The long tentacles “fish” continuously through the water, and each tentacle bears stinging, venom-filled nematocysts (coiled, thread-like structures), which sting and kill adult or larval squids and fishes. Large groups of Portuguese man o’ war, sometimes over 1,000 individuals, may deplete fisheries. Contractile cells in each tentacle drag the prey into range of the digestive polyps, the gastrozooids, which surround and digest the food by secreting enzymes that break down proteins, carbohydrates, and fats, while the gonozooids are responsible for reproduction.
There is a tremendous amount of misinformation, guesstimating and wild wishful thinking involved in wave heights. I thought this article which I have adapted from one the Bureau of Meteorology in Australia put out would be useful. Anyone who visits / uses the beach / ocean needs to understand this concept and the related terminology in use around wave / swell predictions.
A lack of understanding costs the lives of many rock fishermen and boaties every year. It is also the cause of many rescues of swimmers from flash rips. When these large waves hit the beach the massive volume of water has to find its way back out to sea and can / does very easily drag unwary swimmers with it.
Predicting the size of the wind-generated waves that roll in from the sea around Australia is not as hard as you might think—especially if you understand the concept of ‘significant wave height’.
While down at the beach or out on the water you will experience a wide range of wave heights during your activity, and occasionally a genuine ‘big one’, the fabled “rogue”, “bomb” or “wave of the day”. However wonderful a prospect they are to surfers, big waves can pose a serious danger to boaters and fishermen—particularly when they arrive at reefs, bar crossings and deep-water coastlines, where the first indication of a wave’s true size can be as it breaks on the rocks where you’re standing. These are the rock fisher killers and the reason rock fishing is Australia’s most dangerous sport. They are also the cause of many boat capsizes and sinkings due to the simple face that the anchor chain / rope was not long enough to accommodate the big one.
The size and behavior of waves are determined by a range of factors, from the direction of the swell to the speed of the tide, prevailing ocean currents, the depth of the water, the shape of the seafloor, the presence of reefs and sandbanks, even the temperature of the ocean. Ever wondered why on a very large beach all the surfers are crowded into the one or two spots? Well know you know, they have located “The Bank” and are using it to get a good ride. The surfers will also show you where the rips are. They use them as an ocean elevator to get a free ride back out the back for their next ride…
However, there is one factor that rules the size of the waves more than any other—the wind. Waves are caused by wind blowing over the surface of the ocean and transferring energy from the atmosphere to the water. The height of waves is determined by the speed of the wind, how long it blows, and crucially the ‘fetch’—the distance that the wind blows in a single direction over the water.
Naturally, bigger waves result from conditions that cause strong winds to blow for a sustained period over a large expanse of ocean. The resulting waves can travel for hundreds or even thousands of kilometers, smaller waves being absorbed by larger ones, faster waves overtaking slower—gradually growing and arranging themselves into the regular ‘sets’ so familiar to lifeguards, surfers and paddle-boarders. Understanding this along with wave periods, assists the lifeguard to pick the best time and location to head out for a rescue.
The result of these interactions is that it is normal to experience a wide range of wave heights when on the water.
A universal convention to measure wave height
Utilising the standard international convention, the Bureau uses the concept of ‘significant wave height’ to notify ocean-goers of the size of swell and wind waves (or ‘sea waves’) in its coastal forecasts. Significant wave height is defined as the average wave height, from trough to crest, of the highest one-third of the waves.
Devised by oceanographer Walter Munk during World War II, the significant wave height provides an estimation of wave heights recorded by a trained observer from a fixed point at sea. As the following graph shows, a sailor or surfer will experience a typical ‘wave spectrum’ during their activity, containing a low number of small waves (at the bottom) and a low number of very large waves (at the top). The greatest number of waves is indicated by the widest area of the spectrum curve.
The highest one-third of waves is highlighted in dark blue in the graph below, and the average height of waves in this group is the significant wave height:
Significant wave height
This statistical concept can be used to estimate several parameters of the waves in a specific forecast. The highest ten per cent of the waves are roughly equal to 1.3 times the significant wave height, and the likely maximum wave height will be roughly double the significant height. So, if you are going rock fishing or anchoring your boat near a reef etc, remember it is not good enough to simply look at one or two waves and she will right mate…..it won’t be, allow for the bombs or pay the ultimate sacrifice. No matter how good and how fast the lifeguards are, sometimes we will not be able to save you.
Expect double the height, three times a day
While the most common waves are lower than the significant wave height, it is statistically possible to encounter a wave that is much higher—especially if you are out in the water for a long time. It is estimated that approximately one in every 3000 waves will reach twice the height of the significant wave height—roughly equivalent to three times every 24 hours. As a reminder of this important safety concept, the Bureau includes a message that maximum waves may be twice the significant wave height in all marine forecasts.
Most frequent, ‘significant’ and maximum wave heights
When planning a voyage, mariners should not focus exclusively on the significant wave height in a forecast. It is equally important to recognise the concept of the wave spectrum, know the definition of significant wave height, and be able to determine the expected range of wave heights.
Much like the median house price guide in the real estate sector, the significant wave height is intended as an indicative guide that can help you gauge the range of wave sizes in a specific area. While sailors can use the figure to evaluate the safety of an open-water voyage, surfers may use it to rate the likelihood of at least one ‘big one’ arriving while they’re out in the surf. Rock fishers should also be aware of the dangers of the ‘big one’ washing them off the rocks.
Wave forecasts in Australia
Wave height information for seas and swells is included in the Bureau’s Coastal Waters and Local Waters forecasts, covering the Australian coastline and capital city waterways. These forecasts are also transmitted by marine radio (HF and VHF).
Maps and tables of swell and wind wave heights are also available on MetEye—the Bureau’s interactive weather-mapping tool—which allows mariners to ‘play the weather forwards’ over a specific stretch of water for the coming week.
More information on MetEye’s wind and wave features can be found in these recent articles:
Rips can be identified by deeper, dark coloured water, fewer breaking waves and a rippled surface surrounded by smooth water. The most common type is a chanelised rip. These rips occupy deep channels between sand bars and they can stay in the same place for days, weeks and even months.Then there’s boundary rips – which can also be channelised and are found against headlands and other structures reaching out into the ocean like piers and jetties. Sometimes these can be almost permanent. But one of the most dangerous and unpredictable rips is the Flash Rip.
To be able to form, rip currents need breaking waves. It’s the spatial variation in the breaking waves, normally caused by undulations in the sand bars that commonly begins the process of a rip current forming. A flow develops, that moves from the region of intense wave breaking toward the region of reduced or no wave breaking, inside the surf zone This flow is the pathway of least resistance for outgoing water – often a perfect channel – just like a river of the sea.
Typically rip currents are about 10 to 50 metres wide and they can flow anywhere from 50 to 100 metres offshore normally. But Dr Rob Brander has measured rip currents that have flowed 400 metres offshore
To study how rip currents Doctor Rob brander places mobile devices called drifters directly into the currents. These drifters have onboard GPS units that record rip current data such as flow speeds and flow direction both inside and outside the surf zone.
The average rip current flows offshore at speeds of about half a metre to one metre per second. But they all have a tendency to pulse and what that means is that suddenly the rip current can just dramatically double in speed in a matter of thirty seconds and then you’re talking speeds of two meters per second which is literally Olympic swimming speeds.FollowVIDEOTHE FATAL RIPLOADING…
HOW TO SURVIVE A RIP CURRENT
Not all rip currents flow straight out to the breaking waves. Some rip currents flow in a circular movement within the surf zone. These are referred to as rotating eddies. Rip currents are very dynamic – they can change direction quickly.
Rob Brander’s research has revealed that there is no single escape strategy that is guaranteed to get you out of a rip current. Instead you have options based on the conditions and the behaviour of the rip.
The golden rule is to never attempt to swim against the current – they’re just too powerful. Remember to stay calm and focus on floating. Just go with the current and raise your hand for help. Depending on the flow of the rip, floating will normally deliver two scenarios:
A circulating rip current should float you back around to either a sand bank or put you close to breaking waves which will help you get back to shore.
A current that flows directly offshore will normally float you just beyond the breaking waves where the rip will cease to operate. At this point you can either continue to float and wait for rescue or you can swim around the rip and back to shore.
The other option you have – and this applies only to good swimmers – is you can try swimming parallel to the beach in either direction as you float with the current. In some situations this may free you from the rip.
It’s really panic that is the biggest killer when it comes to rips. Rips don’t drown you that don’t pull you under. Panicking will drown you. People panic because they find themselves being taken quickly off shore, the situation is outside of their control, it’s a scary experience.
And what you need to do when you’re caught in a rip is try and take control of the situation yourself. You can float and you can assess what’s going on – do you want to swim this way, do you think that will work. If it’s not working, float a bit and swim the other way or just float. If you’re constantly thinking about the situation and the options you have you’re in control of the situation, provided you haven’t exhausted yourself, but you do not want to panic. Anything that will eliminate panic is the best approach. FollowVIDEOBLACK SUNDAYLOADING…
Each year (on average) rip currents claim more lives in Australia than bushfires, floods, cyclones and sharks combined.
Rip currents are responsible for an estimated 90% of the over 10,000 beach rescues made in Australia each year.
Australia has over 11,000 beaches and scientists estimate that up to 17,000 rips could be operating across Australia’s beaches at any given time
Almost all of Australia’s rip currents fatalities occur on unpatrolled beaches or outside of the red and yellow flags
Less than 4% of Australia’s 11,000 beaches are patrolled by Lifesavers or Lifeguards. This means that there are a lot of beaches and a lot of rips where any beachgoer could find themselves in serious trouble.
Many coastal tourist parks in NSW are situated closest to unpatrolled beaches that are rated as hazardous in terms of rips.
Many of Australia’s rip current drownings take place on isolated stretches of coastline where the nearest patrolled beach is neither close nor convenient.
The simplest way to describe rip currents is that they’re like river of the sea: strong, narrow, seaward flowing currents that extend from the shoreline out beyond the breaking waves. They exist to bring all that extra water that’s coming in with the breaking waves back offshore.
The majority of rip current drowning’s take place underneath bright blue skies, moderate waves and what appear to be perfect beach conditions.
Young males between the ages of 15 and 39 are the most likely to die in rip currents.
Rips are not undertow, they won’t pull you under because there’s no such thing as an undertow. They’re not rip tides because they’re not a tide, they’re a current and they flow pretty steady and they won’t take you to New Zealand.
The new captain jumped from the deck, fully dressed, and sprinted through the water. A former lifeguard, he kept his eyes on his victim as he headed straight for the couple swimming between their anchored sportfisher and the beach. “I think he thinks you’re drowning,” the husband said to his wife. They had been splashing each other and she had screamed but now they were just standing, neck-deep on the sand bar. “We’re fine, what is he doing?” she asked, a little annoyed. “We’re fine!” the husband yelled, waving him off, but his captain kept swimming hard. ”Move!” he barked as he sprinted between the stunned owners. Directly behind them, not ten feet away, their nine-year-old daughter was drowning. Safely above the surface in the arms of the captain, she burst into tears, “Daddy!”
How did this captain know – from fifty feet away – what the father couldn’t recognize from just ten? Drowning is not the violent, splashing, call for help that most people expect. The captain was trained to recognize drowning by experts and years of experience. The father, on the other hand, had learned what drowning looks like by watching television. If you spend time on or near the water (hint: that’s all of us) then you should make sure that you and your crew know what to look for whenever people enter the water. Until she cried a tearful, “Daddy,” she hadn’t made a sound. As a former Coast Guard rescue swimmer, I wasn’t surprised at all by this story. Drowning is almost always a deceptively quiet event. The waving, splashing, and yelling that dramatic conditioning (television) prepares us to look for, is rarely seen in real life.
The Instinctive Drowning Response – so named by Francesco A. Pia, Ph.D., is what people do to avoid actual or perceived suffocation in the water. And it does not look like most people expect. There is very little splashing, no waving, and no yelling or calls for help of any kind. To get an idea of just how quiet and undramatic from the surface drowning can be, consider this: It is the number two cause of accidental death in children, age 15 and under (just behind vehicle accidents) – of the approximately 750 children who will drown next year, about 375 of them will do so within 25 yards of a parent or other adult. In ten percent of those drownings, the adult will actually watch them do it, having no idea it is happening. Drowning does not look like drowning – Dr. Pia, in an article in the Coast Guard’s On Scene Magazine, described the instinctive drowning response like this:
Except in rare circumstances, drowning people are physiologically unable to call out for help. The respiratory system was designed for breathing. Speech is the secondary or overlaid function. Breathing must be fulfilled, before speech occurs.
Drowning people’s mouths alternately sink below and reappear above the surface of the water. The mouths of drowning people are not above the surface of the water long enough for them to exhale, inhale, and call out for help. When the drowning people’s mouths are above the surface, they exhale and inhale quickly as their mouths start to sink below the surface of the water.
Drowning people cannot wave for help. Nature instinctively forces them to extend their arms laterally and press down on the water’s surface. Pressing down on the surface of the water, permits drowning people to leverage their bodies so they can lift their mouths out of the water to breathe.
Throughout the Instinctive Drowning Response, drowning people cannot voluntarily control their arm movements. Physiologically, drowning people who are struggling on the surface of the water cannot stop drowning and perform voluntary movements such as waving for help, moving toward a rescuer, or reaching out for a piece of rescue equipment.
From beginning to end of the Instinctive Drowning Response people’s bodies remain upright in the water, with no evidence of a supporting kick. Unless rescued by a trained lifeguard, these drowning people can only struggle on the surface of the water from 20 to 60 seconds before submersion occurs.
This doesn’t mean that a person that is yelling for help and thrashing isn’t in real trouble – they are experiencing aquatic distress. Not always present before the instinctive drowning response, aquatic distress doesn’t last long – but unlike true drowning, these victims can still assist in their own rescue. They can grab lifelines, throw rings, etc.
Look for these other signs of drowning when persons are in the water:
Head low in the water, mouth at water level
Head tilted back with mouth open
Eyes glassy and empty, unable to focus
Hair over forehead or eyes
Not using legs – Vertical
Hyperventilating or gasping
Trying to swim in a particular direction but not making headway
Trying to roll over on the back
Appear to be climbing an invisible ladder.
So if a crew member falls overboard and everything looks OK – don’t be too sure. Sometimes the most common indication that someone is drowning is that they don’t look like they’re drowning. They may just look like they are treading water and looking up at the deck. One way to be sure? Ask them, “Are you alright?” If they can answer at all – they probably are. If they return a blank stare, you may have less than 30 seconds to get to them. And parents – children playing in the water make noise. When they get quiet, you get to them and find out why.
The next time you are with your friends and or family at the beach or community pool or waterpark, check out the quality of the supervision. That’s right; supervise the supervisor. Audit that lifeguard. Here’s what to look for:
The lifeguard is certified. First thing, go right into the front office and ask to see proof that lifeguards are currently certified in Lifeguarding, First Aid, and CPR. If the front office or person in charge cannot show you this proof, report the facility to the local authority and or health department.
The lifeguard is attentive. He or she is actively watching the swimmers, as evidenced by head movement, alert posture, and active enforcement of rules.
The lifeguard is experienced and professional. Talk to the lifeguard (when he or she is not on duty). Ask questions about the lifeguard’s background, training, and experience. For example, ask the lifeguard about his or her background (e.g., How many years as a lifeguard? What certifications he or she has? What specialised training he or she has received?). Ask how new lifeguards are prepared for surveillance duty after being hired there? Ask how often the lifeguards gets together for in-service (on-the-job) training? Answers may vary, but you should come away with a better understanding of the lifeguard’s preparation (or lack thereof) for the job.