2. Diving computer watch: Diving computer watch is much more important than spare vice head and breathing tube, and it is the key to safe diving. It is expected that diving computer watches will become compulsory equipment in the near future.
3. Slower rising speed: According to the new regulations of the US Navy, organizations will change the rising speed from 60 feet per minute to 30 feet per minute.
4. Reverse diving mode can be allowed. Divers who use diving computer watches can dive deeper than the last time without decompression; Divers using mechanical watches should still follow the forward diving mode to ensure safety.
5. Cross identification. After 1998, many training authorized teachers allowed the college to organize classroom and swimming pool courses in A's training courses and open courses in B.
6. Breathing tube. Breathing tube has always been considered as a lightweight basic equipment, but deep diving is often entangled in fishing nets or camera straps, causing the mirror to fall off. The new regulations suggest that unless there is long-distance snorkeling on the water, try not to use breathing tubes.
What are the steps before diving 1, face to face with your potential partner, and do it? Diving position? Take action to let potential partners know about you? Start? It's time to dive
2. Record the current time (or check the table with potential partners) and record the official diving time (entering the water). Can this time be used when necessary? Decompression diving mode? When a data base.
3. Pick up the compass sleeve, aim it at the water outlet you launched from the sea surface, and record the scale, which can be used as the data basis for your return flight when you dive back. (Suitable for simple compass orientation).
4. Replace the breathing tube with the auxiliary head (breathe evenly at this time).
5. Make an OK gesture with your potential partner, make a gesture to start diving (at this time, BC's inflation and deflation valve is inflated a little (for fear that you will sink at once), then start to deflate (click BC to deflate), dive slowly, hold BC's inflation and deflation valve in your left hand (hold it high with your left hand), and hold the depth gauge in your right hand (pay attention to the depth), and dive slowly and slowly. When diving, face to face with your partner and pay attention to his diving speed. If your partner dives too fast, tell him to slow down. Of course, you should pay attention to the balance of ear pressure.
What are the benefits of diving? 1. Diving is beneficial to shaping people's body and mind in all aspects: the benefits of diving are not only that the fantastic world in water brings great spiritual enjoyment to people, but also that regular diving can develop muscles of 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 of 10 years old, not only can he learn how to install complex equipment, but he can also master the necessary underwater survival skills.
After becoming qualified divers, students will find that they have learned a lot, not only diving, but also knowledge of physics, physiology and oceanography.
2. Diving has the function of losing weight: the environment of water area 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.
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