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How to Ascend in Scuba Diving

How to Ascend in Scuba Diving

Going slow You should always ascend slowly from a dive. This rule is as important as never holding your breath while scuba diving. Coming up in a controlled manner at the right ascent rate is essential to avoid decompression illness. You know that you should never hold your breath when ascending. The reducing pressure during […]

How to Choose a Buoyancy Compensator for Scuba Diving

How to Choose a Buoyancy Compensator for Scuba Diving

Keeping buoyant In its simplest form, a buoyancy compensator, or BC, is merely a bag that you can put air into during the descent and let air out of as you come back up. Why do you need to do that? Although your body is more or less neutrally buoyant, it is not compressible like […]

How to Choose a Mask, Fin and Snorkel for Scuba Diving

How to Choose a Mask, Fin and Snorkel for Scuba Diving

Masks, fins and snorkels make up the most basic equipment used by those who want to swim underwater. Diving masks Your eyes are designed to work well in air. Try to use them in the much denser medium of water and you’ll have difficulty focusing because light bends differently in water. To solve this problem, […]

How to Choose a Drysuit for Scuba Diving

How to Choose a Drysuit for Scuba Diving

Functions of a drysuit Drysuits are used in temperate climates where the water may not be very warm. The core function of a drysuit is to keep you dry. To do this, it must fit you well, have efficient seals at the neck and wrists, and be made of a material that does not allow […]

How to Choose Compressing Gases for Scuba Diving

How to Choose Compressing Gases for Scuba Diving

Filling tanks It is possible to compress a lot of gas into a small space. The total mass of the gas remains the same, but the molecules are pushed closely together. It is possible to fill a tank that would normally have, say, 12 L (0.4 cubic feet) of air at normal atmospheric pressure (1 […]

How to Choose Cylinders, Tanks and Bottles for Scuba Diving

How to Choose Cylinders, Tanks and Bottles for Scuba Diving

What’s in a name? Whatever you want to call them, cylinders, tanks or bottles are the transportable high-pressure vessels that contain the gas you are going to breathe. They can be made from steel or aluminum. Steel or aluminium Steel cylinders usually have a rounded bottom for weight-saving reasons, so they are fitted with a […]

How to Choose Hoods and Gloves for Scuba Diving

How to Choose Hoods and Gloves for Scuba Diving

Head cover Our brains need a plentiful supply of blood to work properly but can’t do so in the cold. Yet few of us have much naturally provided thermal insulation in that area. We lose a lot of body heat through our heads, so it makes sense to provide this area with its own extra […]

How to Choose Regulators and Pressure Gauges for Scuba Diving

How to Choose Regulators and Pressure Gauges for Scuba Diving

A typical regulator reduces the pressure of the air in the tank in two stages so that, at the mouthpiece, it exactly matches the pressure of the water surrounding it. Understanding regulators A regulator is a device that allows you to breathe air from a tank. The modern two-stage scubadiving regulator valve is a relatively […]

How to Choose the Right Wetsuit and Semi-Dry Suit for Scuba Diving

How to Choose the Right Wetsuit and Semi-Dry Suit for Scuba Diving

Why wear a suit? Water conducts heat 25 times more efficiently than air. That’s why water is usually used to conduct heat in central heating systems. Your body makes heat to maintain your own body temperature. Water will conduct this heat away from you much quicker than if you were in air of the same […]

How to Choose Weights and Weightbelts for Scuba Diving

How to Choose Weights and Weightbelts for Scuba Diving

Weighed down Most people are naturally neutrally buoyant. With a normal relaxed lung volume, they neither float nor sink. If they take a deep breath, they will float. If they empty their lungs, they will sink. As soon as a diver puts on a diving suit, more water is displaced by the suit and the […]

How to Clear Your Ears in Scuba Diving

How to Clear Your Ears in Scuba Diving

Ear problems Many people say that they cannot learn to dive because they get pain in their ears when they swim underwater. This is not surprising because if you don’t know how to clear your ears, whether you’re scuba diving or simply swimming underwater, you will be in danger of rupturing an eardrum – a […]

How to Conquer Your Fears in Scuba Diving

How to Conquer Your Fears in Scuba Diving

First fears When you first struggle into a wetsuit and strap on that heavy tank and those big weights, it’s quite disconcerting. You could be forgiven for thinking you might get into the water and sink out of sight forever! Once you find out that doesn’t happen, you have to cope with the claustrophobic feeling […]

How to Control Your Buoyancy in Scuba Diving

How to Control Your Buoyancy in Scuba Diving

Perfect weightlessness The art of diving is to achieve perfect weightlessness. This means having control of your buoyancy – to be neither floating up nor sinking down and to be able to go in any direction at will, with the least effort. This is what scuba diving is all about. It is called neutral buoyancy. […]

How to Gain Confidence in Scuba Diving

How to Gain Confidence in Scuba Diving

Practice, practice, practice If you want to be good at anything, you need to practise. It’s the same with scuba diving. All the skills you first learn in the pool, and later in open water, need to be practised until you just do them without even thinking about it. Accomplished divers – and you can […]

How to Handle Emergency in Scuba Diving

How to Handle Emergency in Scuba Diving

When you are diving, one accident or mistake can lead to another. This is sometimes known as the incident pit. If a small thing goes wrong and is not corrected, before long a full-scale incident has developed. Always deal with any problems promptly. Helping yourself It is your responsibility to rescue yourself. For example, you […]

How to Learn the Basic Theory on Scuba Diving

How to Learn the Basic Theory on Scuba Diving

It’s a pity that scuba diving is not simply a matter of swimming around underwater while breathing from an independent air supply. In the early days of the aqualung, some adventurous people tried doing this without any basic understanding of the effects of breathing compressed gas while under the very intense pressure caused by water […]

How to Manage Risk in Scuba Diving

How to Manage Risk in Scuba Diving

Risk management is your own responsibility. You’ve been told what conditions to expect; you know what equipment you have at your disposal; you know how much breathing gas you have to complete the dive; and you know how you will get back out of the water. What are the risks that you must consider? Pressure […]

How to Practice Scuba Diving in the Pool

How to Practice Scuba Diving in the Pool

You should practise basic safety drills, such as clearing your mask and regulator mouthpiece, whenever you can. Both are essential skills, and a swimming pool is the ideal place to practise them. If you are a member of a diving club, there are usually pool sessions once a week. Mask removal Removing and replacing a […]

How to Prepare Safety Equipments for Scuba Diving

How to Prepare Safety Equipments for Scuba Diving

Carrying a knife Divers use knives as tools for getting out of trouble. In the days when divers wore brass helmets and lead boots, a large brass-handled knife strapped to the chest was essential. The knife was there in case the lifeline got snagged and the diver had to cut the line. Today, diving in […]

How to Share the Air While Scuba Diving

How to Share the Air While Scuba Diving

In the early days of scuba diving, people practised sharing one regulator between two people. This was easy to perform in the pool but was probably responsible for a lot of accidents in the sea. The octopus rig Someone then realised it made sense to fit an alternate second-stage to the regulator, called the octopus […]