Can I dive if I can’t swim?
I can dive if I can’t swim. Diving
is the kind of tourist diving with oxygen tank equipment. It is possible to go into the sea after simple training, provided that there are no restrictions on some diseases, such as heart disease and high blood pressure. There will be an instructor to teach you before diving, and the process is very simple, you only need to master a few basic movements and gestures.
Types of diving
Divided by submersibles: hard diving, soft diving, semi-closed circuit air supply, on-demand air supply, self-contained air Mode.
Divided by diving methods: unsaturated diving, saturation diving; divided by breathing gas types: air diving, nitrogen, oxygen mixed gas (artificial air diving), helium, oxygen mixed gas (artificial air diving) , hydrogen, oxygen mixed gas (artificial air diving), other mixed gas.
What are the diving equipments
1. Masks
The diving glasses on the market are mainly divided into silica gel in terms of material. There are three kinds of rubber and PVC; rubber and PVC materials generally have some odor, and rubber materials have rarely appeared in the leisure market; generally better diving goggles are made of silicone, non-toxic and tasteless, and the price is slightly more expensive than pvc, but softer , more durable and more comfortable to wear.
The shape is mainly divided into double lens and single lens. There is no difference in the use of these two types, and the field of view is similar. The advantage of double lens is that it can be matched with myopia lens; the choice is mainly based on whether it conforms to your face shape and personal preference. There is also a Fullface Mask; a full-face mask, this type of mask is designed so that divers do not have to hold the respirator in their mouths, and is combined with a communication interface, mainly to enable divers to communicate underwater; mostly used in engineering diving.
2. Breathing tube
The material of breathing tube is also mainly divided into silicone and PVC. Silicone tube is the best; The all-dry type is a design that has only appeared in the past 1-2 years. The nozzle is covered to prevent water from entering, which is very popular among beginner players; but from a practical point of view, it is still a traditional non-dry breathing tube, with a simple structure and smoother breathing. .
Purchase Note: The selection of the breathing tube must conform to the principles of ergonomics and mechanical design, the diameter and length should be appropriate to facilitate drainage, and there should be a design of a water stop valve to prevent seawater from entering. The part of the mouthpiece should be the best choice for occlusal comfort.
3. Cold-proof clothing
Cold-proof clothing, also known as diving suit. It is mainly divided into wet type, semi-dry type, full dry type, and wet type is divided into 3mm, 5mm, 7mm and other different thicknesses. Wearing semi-dry and full-dry wetsuits can keep your body from getting wet, and you can also wear warm clothes inside for the best thermal insulation effect. The choice of wetsuit is mainly determined by the ambient water temperature of diving; in tropical or temperate waters, 3mm thick wetsuit is the most commonly used; the lower the water temperature, the thicker the wetsuit is; if diving in a water temperature below 20 degrees, you need to wear a wetsuit Semi-dry or full-dry; full-dry suits even allow for sub-ice diving.
Purchase Note: In order to achieve the effect of cold protection, the cold protection clothing should be fit, soft, easy to put on and unload, not easily deformed, and should not affect the diver’s ability to move. Next, choose the pattern you like. [Details]
How to balance ear pressure when diving
1. Pinch your nose and inhale. Ear pressure equalization refers to the technique of making the pressure in the ear equal to the pressure of the surrounding environment in a certain way. The more commonly used method is to pinch the nose and blow the air, pinching the nose to block the nostrils, and then gently exhaling through the nose. At this time, the eardrums will feel bulging outwards and there will be a rattling sound.
2. In addition to pinching the nose and inflating the air, you can also achieve ear pressure balance by swallowing saliva, yawning or swinging the jaw left and right.
Dive essential emergency safety knowledge
1. Cramps
If you are nervous, the water is too cold, or you spend time in the water Too long and you may cramp. The preparation before going into the water should be sufficient, and the time in the water should not be too long. When cramping occurs, don’t panic. For example, toe cramps, then immediately bend the leg, pull the toes apart and straighten; for calf cramps, take a full breath first, lie on your back on the water, hold the toes with your hands, and push the calf forward vigorously, Let the contracted muscles stretch and relax; when the fingers cramp, clench the hand into a fist, then open it hard, and repeat this way to release.
2. Dizziness and bloating
The main reason is that the diving time is too long, blood accumulates in the lower limbs, cerebral ischemia, and the body consumes a lot of energy and the body is overtired. Immediately go ashore to rest, keep your body warm, and drink some light sugar and salt water as appropriate.
3. Nausea, Vomiting
This happens when you choke on dirty water in your nose. Go ashore as soon as possible, and then press the Zhongwan and Neiguan points with your fingers. If you have Rendan, you can also take a pill. To prevent enteritis, you can also eat a few cloves of raw garlic.
4. Itchy eyes
It may be caused by unclean water. Immediately after landing, the eyes should be washed with clean salt water, and then instilled with chloramphenicol or erythromycin eye drops. It is best to do a hot compress before going to bed.
5. Headache
The reason may be chronic rhinitis, choking water or body cold, and temporary cerebral vasospasm caused by insufficient blood supply. At this time, you should go ashore quickly, press and knead the Baihui, Taiyang and Lieque points on the top of your head with your thumb, then apply a hot towel to your head, and drink a cup of hot water, you can get better.
6. Abdominal pain and bloating
Abdominal pain and bloating will occur just after eating or diving on an empty stomach. At this time, you should go to the shore and lie on your back, use the tip of your big toe to press the middle hospital, upper hospital or Zusanli, and at the same time take 3 to 5 ml of ten drops of water, and apply a hot towel to the abdomen.
7. Earache, tinnitus
It may be water in the ear or choking in the nose, you can tilt your head to the side where the water enters the ear, pull the earlobe hard, and use the same side Jump with one leg. Or put the palm of your hand on the ear canal, plug the ear tightly with your hand, tilt your head to the left when the left ear enters the water, and then quickly pull your hand away, the water will be sucked out.
8. Itchy skin and rashes
Mainly caused by skin allergies. Disembark immediately. Take a tablet of Symbiodin or Chlorpheniramine and it will get better soon.
What to pay attention to in diving
1. First of all, diving is difficult for beginners, because diving is a systematic project. Advanced diving should be learned slowly. As a beginner, if you want to try advanced diving, it is best to receive relevant training.
2. Follow the principle of two people walking together, that is, you need to keep two people together from entering the water to landing. When diving, you must follow the instructor closely, and keep in touch with the instructor’s gestures at all times. safer.
3. When we choose to dive, we must choose a formal and safe diving area. Don’t choose a cheaper area because of the high price. It may be a cheaper area, and there is no safety guarantee. It belongs to an informal diving enterprise. .
4. It is necessary to put on the equipment before diving. It is necessary to check whether the equipment is fit and function properly. Learn how to use the snorkel and regulator, how to rest on the surface, and how to deal with emergencies. Wait. Of course, two people can help each other check the equipment.
What are the benefits of diving
1. Wonderful feeling
The recreational diving that people yearn for is in a kind of weightless diving. In this state, enter a completely different space, let people completely relax, let everything be casual and natural, and silently watch all kinds of colorful and exotic corals and fish in the quiet seabed. Use gestures and eye contact to communicate with your peers. This kind of feeling is impossible to obtain on land, and it is also impossible for people who have not really dived into the sea to get it.
2. Physical exercise
Diving can increase lung capacity, enhance the strength of major muscle groups, improve swimming skills, exercise physical fitness, and even lose weight.
3. Knowledge acquisition
In addition to mastering a lot of physical, physiological and medical knowledge about diving and marine biological knowledge, you can also learn first aid, drowning rescue and other knowledge.
4. Fitness, beauty
Since diving breathing is compressed air, oxygen molecules can better penetrate into the skin through the flow of blood, and accelerate the metabolism of the skin, so as to achieve The effect of beautifying the skin. Since people consume more heat in water than on land, diving has also become a good way to lose weight and exercise.
5. The tempering of the will
Diving can also temper the will and cultivate team spirit. Diving can exercise people’s psychological quality, learn how to face unfamiliar environments, and enhance their ability to deal with crises and emergencies. Divers and diving instructors must strictly abide by the diving buddy system, no matter how high their level is, they cannot dive alone, and diving buddies must take care and help each other.