Is Buoyancy the Single Most Important Scuba Diving Skill?

Is Buoyancy the Single Most Important Scuba Diving Skill?

When starting out scuba diving most trainees struggle with their buoyancy for a while. They are introduced to an alien environment and find that they are either floating or sinking. Unfortunately, many divers with years of scuba diving behind them still have problems with their buoyancy. In the shallow confines of a training pool bad buoyancy can be corrected by the instructor. When deep diving for extended periods of time this is not possible and poor buoyancy could be extremely dangerous.

The physicals laws of buoyancy are described by Archimedes Principle - that most of us encountered at school. It states that a body immersed in a liquid experiences an up-thrust on it that is equal in size to the weight of the liquid that it is displacing. Therefore if a boat displaces water equal in weight to itself then this will be experienced as a force pushing it upwards so that it floats on the surface. Conversely a stone will sink because being denser than water it displaces a volume weighing less than itself. The up-thrust is less than its own weight and it therefore sinks.

The boat is exhibiting positive buoyancy whereas the stone is negatively buoyant. We scuba divers do not want to flop on the surface or sink like a stone. We need to be neutral in the water so that with a lazy kick of our fins we can move up or down. If we floated we would have to paddle hard to duck beneath the surface and if we sank, we would always be struggling to compensate for the tendency to sink.

Neutrally buoyant means less effort and therefore less air consumption. It allows us the best control of our attitude within the water and is more comfortable than always having to swim to keep a position. Scuba diving enthusiasts get to be neutral by balancing their diving equipment. Often this is by trial and error and because a thick insulating wetsuit or dry suit is usually worn it will mean adding lead weights to the scuba gear. Often several kilos of lead are added by way of a weight belt or alternatively in weight pouches in the buoyancy jacket. The time to adjust weighting is at the end of the dive, when most of the air has been drained from the tanks. As the air that has been breathed can weigh a couple of kilos, depending on the size and configuration of tanks being used, the diver is at his or her lightest at the end of the dive and at this point must adjust their weighting to achieve neutral buoyancy. Carrying this out at the start of the dive could result in the diver being very positively buoyant by the end of the dive!

The weight belt and weight pouches can be removed by the diver quickly. The weight belt has a quick release buckle and the pouches are usually attached by Velcro. Thus, in an emergency the diver, or his buddy, can remove the weights and the diver will shoot to the surface where he can be rescued. This is a controversial rescue method, and the deeper and longer the dives being conducted, the more dangerous as an emergency procedure this becomes. A rapid ascent in only a few meters of water by a panicking diver after a twenty minute dive is likely to lead to a safe rescue. A similar buoyant ascent from 40 meters after an hour under water will lead to severe diving illness such as burst lung and decompression sickness. Even if a safe ascent is made, the diving computer used to monitor the dive will probably lock you out from diving for a day or more after a too swift ascent.

For such extended range diving it is often advisable to reduce the emergency jettison weights, to ensure that an emergency ascent is not too swift. Many divers have a combination of pouches and weight belts so that only part has to be removed to achieve slight positive buoyancy. A technical diver may even use integral weights in his twin set that cannot be removed. They know that a rapid ascent would be just as final as drowning. Some will wear a couple of removable kilo weights in small pouches - some do not.

Buoyancy is seen as a critical skill in scuba diving. Without good control, it is impossible to swim over delicate coral without doing damage or hard to hover while carrying out safety stops or decompression procedures. Being over weighted can be dangerous and even worse, wearing ill fitting or badly secured weights can result in unexpected buoyant ascents and the consequential damage this can do to a diver's body.

Mark Jenner is a BSAC Dive Leader and Open Water Instructor. He has been diving for over 20 years and enjoys writing about the sport. You can read more about key diving skills and scuba gear reviews on his diving web site and about important scuba diving decompression subjects such as which dive computer to use on his diving blog site.


Article from articlesbase.com

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Be aware of All The Security Specifications Of The Most recent Dive Watch Computer Prior to Buying One

Be aware of All The Security Specifications Of The Most recent Dive Watch Computer Prior to Buying One

Some folks do diving for a ardour whereas some others take it as a profession. . There are a lot of people who love scuba and deep sea diving and or some folks in the journey business, it could possibly be a way of making some money. So whether you´re a professional of a ocasional diver, a dive watch computer is an indispensable tool to ensure a safe dive.

For some individuals, breaking in addition to setting data is a passion and diving is a sport for them. It is for these folks that one thing often called the dive watch computer may are available in very handy. It has solely been a short while since its introduction nevertheless it already has announced it arrival slightly lavishly.

As it's fairly apparent from the name, the dive watch computer is one thing that offers the flexibility of a dive watch and the specifications of a miniature pc at the same time. This is especially helpful for individuals who wish to report their dive statistics and details for use later. In many of the different watches, you'll be able to look at the depth in addition to the time you've gotten spent contained in the water, but you don't have any method of recording and retrieving these particulars, which is the place the dive watch computer comes in so handy. This is also a superb example of the miniaturization and high finish computing capacity that the latest technology is ready to afford so readily.

Along with these amazing options, good dive computer varieties would also ensure that these are waterproof and pressure resistant for your best diving pleasure. It is also true that while you will get such pieces ate various value ranges, you would do well to be sure of the standard that's on supply at cheap price so that you just get the best value for money. These dive computers can be very subtle and may also do numerous computations, compilations and information retrievals in actual time.

The brilliant display of the watch ensures that you are able to do all the calculations robotically even when you find yourself deep down in the ocean.

Certain dive watch computers come with a singular function which permits them to oversee the pressure of the oxygen cylinders. This is indeed a life saving function that might additionally present an alarm to the diver in case oxygen is about to run out. You possibly can check out details of assorted dive watch computer varieties on-line for best results.

People are shopping for a dive watch computer that offers all the essential info for a safe dive. With advancing tools and lowering prices, these computers are becoming increasingly widely held. We incorporated the newest dive watch computers offered in the market in our evaluation and came up with the greatest five dive watch computers that received record notes from our licensed test team and that received the top and most customer reviews.

A dive watch computer is an indispensable tool to ensure a safe dive.
Check this review for the best dive watch computer on the market today.


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