Produkt

KlappentextThe companion book for the first diving course. More and more kids and teens want to learn to dive. 'Let's dive' is an excellent illustrated guide. The self-explanatory step-by-step-illustrations and the easy-to-understand texts explain in clear and simple terms and in a very interesting and entertaining manner. This book support the learning up to the first diving certificate. Many practical tips and hints make the book an ideal companion for young divers.

Stephanie Naglschmid is an illustrator, graphic designer, publisher and artist for fine art. Her hobbies are reading and writing books, snorkeling, diving. Other activities: Since 1984 owner of the publishing house Stephanie Naglschmid with the topics diving, nature and health Since 2001 Art Director of the specialist magazine DIVEMASTER. Web design, advertisement design and media agency Member of I.O. Illustrators organization Stuttgarter Künstlerbund e.V.

Details

Weitere ISBN/GTIN9783895949371

ProduktartE-Book

EinbandartE-Book

FormatEPUB

Format HinweisKopierschutz: Wasserzeichen, Lesegeräte: PC/MAC/eReader/Tablet

Verlag

Verlag Stephanie Naglschmid

Erscheinungsjahr2016

Erscheinungsdatum01.07.2016

SpracheEnglisch

Dateigrösse10977

Artikel-Nr.17496432

Rubriken

Genre9200

Inhalt/Kritik

Inhaltsverzeichnis

Preface

Chapter 1
How to start?
Where do you have to go?
What do you need?
Mask
Fins
Snorkel
Snorkeling
Equalizing pressure
Mammalian diving reflex
Descend and equalize pressure
Descend and ascend
Fin swimming techniques
Clearing the mask
Debriefing
Optics
Underwater vision
Underwater hearing
Pressure and body air spaces
Dangers

Chapter 2
What gear do you need?
SCUBA
First breathing exercises
The diving suit
BCD and weight belt
Fit up your SCUBA
Putting on the SCUBA

Chapter 3
Diving practice
The first dive
The right amount of lead
Descending
Balancing your buoyancy
Diving posture
Sharing the air
Explore, observe and enjoy
Ascending
Maintain your equipment

Chapter 4
The science of diving
Physics of diving
Pressure and volume
What does air consist of?
Solution ratio of gases
Decompression sickness
Decompression tables .
Profile of a dive
Additional equipment

Chapter 5
Boat diving
Diving buoy
Diving flag
Entry from the boat
Anchor rope - meeting point
Indicating the diving direction
Light under water
Wrecks
Dangerous animals
End of dive
Entry into the boat
Medical aspects
Sunprotection
Recreation
First aid
Getting your certificate

Chapter 6
Diving and what else belongs to
Scuba signs
Diver`s log
Dangerous sea
Checklist and diving bag
Diver¿s Code
FAQs
Secondary education
Special certificates
Adresses und links
Index of keywordsmehr

Leseprobe

Chapter 1

How to start and where to go

-Diving!

-Where do you have to go?

-What do you need?

-Snorkeling
There are many reasons why someone wants to go diving...

... one may dream of the richly colored animal kingdom or the sightings of big and small fish. Another may want to explore wrecks and find historical treasures. No matter what reasons drive you to jump into the underwater realm, today it is easier than ever.

Let s start ...
Where to go?

The best place to go to is a diving base or school close to you or you can join a diving club with youth membership. Diving schools and clubs usually offer additional possibilities to go diving off-season, and you can find people with similar interests for diving in your region. You ll find the main addresses in the appendix.

During vacation, you can visit the training courses given by a local diving school to receive diving instruction. They will teach you the important theoretical and practical basics and will deal with common needs and wishes.

It is very important that you re healthy. This means you will need a quick medical checkup. Also, you shouldn t dive with a cold, a temperature, or allergies, or generally if you feel sick or unwell because diving has a lot to do with your breathing organs. But more about that later.

If you have any doubts whether you are allowed to dive, ask a doctor without hesitation. Generally, parents must give their permission before adolescents are permitted to start scuba training.
What do you need?

Your diving instructor will first introduce you to what is known as the ABC equipment. ABC has nothing to do with preschool in this case, but stands for the first three main parts - or the basics - of diving gear: mask, snorkel and fins.
Mask
It is vital for the mask to fit well and to provide a second seal topping. Nothing is more uncomfortable than not being able to see clearly underwater, because your mask is leaking or letting water in. The best way to test whether the mask shape fits you is to put the mask on without the strap. Put a little bit of pressure on it and breathe in through your nose, holding your breath for some seconds. If you let go now, the mask should stay in place due to the suction pressure. If it does not, the mask is too big. If it leaves clear pressure marks, the mask is too small. In addition, the mask should provide enough space for the nose to be easily held by two fingers. This is important to equalize pressure.

There are masks in all shapes and sizes. Some prefer separate glasses and professional black , others want as much view and as many shiny colors as possible. They also come with optical glasses. If the mask fits well, contact lenses can be worn without a problem.

One tip for a clear view - it´s not to everybody s taste but it helps - guaranteed: Before placing the mask, spit in the dry mask and cover the whole glass from the inside. Then clean it quickly with water. This prevents the mask from fogging because the spit contains encymic probes to remove the layer of fat on the glass. There are also special cleaning liquids that provide the same effect, but they are not always at hand.
Fins
Fins come in various colors and shapes. Normally, one can differentiate between full foot-pocket fins and open-heel foot-pocket fins. The first have a continuous foot bed because they are worn barefoot and are mostly used for snorkeling or training.

Open-heel foot-pocket fins are open at the heel and are closed by a click and snap strap. Bootees are required when you use open-heel foot-pocket fins. They are like socks for divers made out of neoprene. They have the advantage of protecting you from hot sand or sharp stones after the fins are removed.

Also keep in mind that the scuba gear weighs a couple of pounds, which you can feel with every step and somehow you have to reach the big wet area out there, right?

Full foot fins (enclosed heels)

Fins with open heels which allows to wear neoprene boots.

Tip: Put the fins on after you ve reached the water or are very near to it because fins give you a silly walk and almost guarantee a bad fall. If there is no other option than walking with fins, walk backwards. And look behind you!
Snorkel
The snorkel is a great invention and allows you to breathe while your head remains underwater. As long as you stay near the surface, the snorkel stays clear and you can breathe without interruption. If you dive, the snorkel will fill up with water of course.

When you reach the surface again, you first have to blow the snorkel clear, otherwise your next breath will be a little bit wet, and that will only amuse the onlookers. So breathe in before diving and keep some of the air - do not breathe all your air out underwater- so that you have that little extra left. Start to blow out the snorkel a second before you reach the surface.

There will still be a little water left, but that´s okay because it does not block the airflow. Some sophisticated snorkel designs provide a valve which drains the snorkel completely. Just ask the diving instructor. A good snorkel for young divers has a diameter of 1.8 cm / 0.7 in (for adults up to 2.4 cm / 1 in) and a maximal length of 30 cm / 11.8 in. Look for a comfortable and well-fitting mouthpiece.
Snorkeling

Once you gather your ABC gear, you should usually get your own box from the school to organize and transport all your gear. Clean equipment goes without saying. After all, your life depends on it. A diver who cares for his gear and keeps his equipment in good shape will also be accepted as a trustworthy buddy.

Before you start, there are some theoretical lessons about discipline so that you have a little inside understanding of underwater processes. This is where the nose cover of your mask comes in handy. Surely you are familiar with the feeling of pressure in your ears - for example on a plane during takeoff or inside a train while it enters a tunnel. That sensation is caused by varying pressure pushing against your eardrum.

Similar to the experiment displayed on the right, with the cup underwater, the elastic eardrum bends inward when pressure rises. If the pressure rises too high, the eardrum can tear. This must be avoided at all costs. A tear or too much bending is not only painful, it also means no more diving at all until the rupture heals - and that takes a long time.
Equalizing pressure
To avoid damage to the eardrum, you must equalize the pressure. Just pinch your nose, squeeze it tight enough so that no air can escape through it, and start blowing gently through your nose. You ll feel an immediate releasing click in your ears. That is the equalizing pressure technique. As your mouth and nose are connected to your middle ear, the pumping provides balance to stabilize the outer water pressure. Sometimes you can achieve this by simply swallowing, but the first method is more efficient.

The deeper you dive, the higher the pressure will rise against your eardrum because more water is above you. That is why you need to equalize pressure regularly several times, especially when you descend. When you ascend, this is not necessary because it works automatically once the pressure eases.

Important: If the connection to the middle ear is clogged, for example, when you have a cold and the mucoses are swollen, you cannot equalize the pressure. In this case, do NOT dive!
Mammalian diving reflex
Another important point is compensation of the mammalian diving reflex. You can test this by putting your head underwater only equipped with a snorkel and by holding your nostrils tight. You can keep your eyes closed or open. Then let go - breathe in and out through the snorkel. Your body should automatically block breathing through your nose, so you breathe only through your mouth and no water can enter your nose. The more often you train this procedure, the more automatic it will become. At best, you should be able to do it without thinking.

Different respiratory possibilities
Descend and equalize the pressure
Finally, we can enter the underwater realm. Next, your diving instructor will train...
mehr

Autor

Naglschmid, Stephanie

Stephanie Naglschmid is an illustrator, graphic designer, publisher and artist for fine art. Her hobbies are reading and writing books, snorkeling, diving.

Other activities:
Since 1984 owner of the publishing house Stephanie Naglschmid with the topics diving, nature and health

Since 2001 Art Director of the specialist magazine DIVEMASTER.
Web design, advertisement design and media agency

Member of
I.O. Illustrators organization
Stuttgarter Künstlerbund e.V.

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