Tools needed for diving
1. What tools do you need to prepare for diving?
Diving goggles, breathing tubes and flippers are collectively called simple diving? Sambo? , use? Sambo? Snorkeling can be done on the water. Snorkeling? .
A mask? A window to enjoy the underwater world.
Snorkeling? Breathe easily.
2. Technical essentials of diving
The necessary learning of diving in the sea: including the use of breathing tubes and regulators, the method of water rest, the handling of emergencies and so on. Preparation before entering the water is very important. Check whether the equipment function is normal by yourself, and then check each other between peers. Entry posture: dive straight ahead-the water depth should be above 1.5m, with your feet spread back and forth, with one hand pressing the mask and the other pressing the cylinder belt. Sit with your back to the water-sit in the boat face in and dive on your back. Sit in the water-suitable for beginners. Go sideways into the water-then float on the rubber boat and roll into the water. Diving: B.C. (Buoyancy Regulator) method-Buoyancy Regulator, with counterweight belt, diving from head to toe. No, BC-head, feet.
3. Diving precautions
Keep communication during diving, and communicate with divers and companions. Effective communication better ensures the diving process. In foreign countries, not all divers are in the simple mode of "belt" or "belt". In some popular diving spots, one person often takes more than a dozen people to dive, so we must strictly abide by the rules of the team, and even if there is an emergency underwater, we can find a solution in time.
The benefits of diving
1, diving is beneficial to the overall shaping of human body and mind.
The advantage of diving is not only that the fantastic world in the water brings great spiritual enjoyment to people, but also that regular diving can develop muscles in all parts of the body, improve physical qualities such as strength, speed, endurance and flexibility, cultivate people's will to be brave, tenacious, cooperative and cautious, increase intelligence, self-confidence and leadership, and improve academic performance. For example, for a child aged 10, not only can he learn how to install complex equipment, but he can also master the necessary underwater survival skills.
2, diving has the effect of losing weight.
The environment of water is very different from that of land. Studies have proved that people's resistance in water is more than 800 times that in air. The great resistance brought by water will increase the difficulty and total amount of exercise, so that you can complete an action with more than 6 times the usual strength, thus achieving twice the result with half the effort. On the other hand, the thermal conductivity of water environment is more than 20 times that of air, even if it is still in water, it will consume a lot of energy. Like a boiling egg, it cools much faster in water than in air.
Who is not suitable for diving?
1, otolaryngology patients
At the bottom of the sea, the pressure of water pressure on the eardrum is very obvious, so the ear will feel pain. If people with ear diseases dive, they are very uncomfortable and will aggravate their illness, so don't take part in diving. Without a nose, we can't breathe normally at the bottom of the sea. We have to go through some equipment. If we have rhinitis or a cold with a stuffy nose and can't breathe oxygen at the bottom of the sea, it will be life-threatening, so people with nasal diseases should not dive.
2. Patients with cardiopulmonary diseases
Diving is an exciting sport, and patients with heart disease must not take part in it, nor patients with asthma and other lung diseases can take part in diving. The water pressure at the bottom of the sea will also compress the lungs, making people unable to breathe normally, which is very dangerous.
3. Patients with cardiovascular diseases
People with cardiovascular diseases such as diabetes, hypertension and hypotension, it is best not to dive. When breathing at the bottom of the sea, the proportion of blood concentration will change, thus changing the blood sugar concentration, which is very unfavorable to diabetic patients and even causes shock in severe cases. Changes in water pressure can also cause changes in human blood pressure, so people with high blood pressure and low blood pressure are not suitable for diving.
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