Generally speaking, you need to take a diving certificate to play freediving, and Li Du is working, so there is no need for a diving certificate. Pen ~ fun ~ pavilion www.biquge.info

Malins is a very responsible diving instructor, and he strongly demanded that the four of them take a diving certificate, because it is not difficult to take this certificate, and three days are enough.

"With my guidance, three days won't be needed, if you study hard, then two days are enough to get this certificate." Malins said confidently to them.

Just like taking a driver's license, taking a diving certificate in Australia is divided into several courses, which are theoretical and practical.

The two days that Mullins said were to get the results of the theory course, and the practical class would take more time, and it could be passed by the way when you went into the water to study.

That's the benefit of them paying a premium for a trainer class, and Malins is also the proctor for the dive exam, so he can sign their dive training sheets.

In this way, Li Du and others don't even need to go to the examination agency for reference, as long as they combine the results of the theoretical course, they can finally come up with the certificate directly.

Although he is young, he is very experienced in this area.

He found a hotel for the four of them, which was inexpensive and located by the sea, with a large ocean diving pool.

Malins' purpose is that he will lead the four of them to a theory class, and when they are tired of learning, they can take them to the pool to dive, and by the way, they can master the skills of snorkeling and deep diving.

The course arrangement is 1+1 system, that is, one hour of study, and Malins took them to the pool for an hour of training.

This arrangement can help them save physical strength and time as much as possible, but the physical requirements are still very high, and the brain and body need to rotate continuously.

The theory course of diving is not difficult, and there are mainly two books as the program, namely "Open Water Diver Manual" and "Recreational Dive Planner Instruction Manual".

The four of them are all college students, and Brother Wolf is considered to have dropped out of college, but the reputation of the university he studied is the best among the four, and he was needed to join the army when he dropped out of school.

Therefore, the four of them did not have much pressure to study the cultural class, and it only took a day and a half to follow Malins to take the exam, and the cultural class passed the standard.

The first day and a half they have been learning snorkeling, all four of them can snorkel, but they know how to swim, in fact, except for Brother Wolf, the other three don't understand the skills and experience of snorkeling.

Even if Brother Wolf's skills and experience are not up to standard, he received militarized training in the army, which belongs to military skills, and everything is based on completing the task as the first requirement.

What Malins taught them was survival skills, and everything was about saving their lives.

Snorkeling is the foundation of all diving, in fact, many skills in deep diving and freediving are derived from the process of snorkeling.

Li Du couldn't control his body well when he encountered the undercurrent of the sea, that is, his snorkeling ability was too poor, and his snorkeling ability had to pass, first of all, he could still swim freely in the turbulence of the sea.

After two days of snorkeling training, after the test on the third day, Malins took them to start their deep diving training.

Although it was only training, Malins prepared a full set of tools and brought an assistant who was also a veteran diver to take care of the four of them.

The first training was still carried out in the hotel pool, which had an area up to 40 meters deep.

Standing on the edge of the pool, Malins explained to them: "Remember, you must know your equipment before you go into the water, equipment is your survival underwater, and they are more important to you than guns are to warriors." ”

"I told you about the mask, snorkel and fins when I was snorkeling, and now I want to highlight the scuba system."

"When diving, the scuba system is at the heart of what supports you to survive in the water, and it has four equipment systems integrated into a single kit, buoyancy adjustment system, regulator, oxygen cylinder and counterweight system......"

He explained the scuba system to the four of them in detail, among which there is an unspoken rule when choosing oxygen cylinders, that is, the usually used oxygen cylinders, the cap of its cylinder valve is unscrewed, and it cannot be installed after use.

If the cap of the cylinder valve has not been moved, it proves that it is a new bottle and can be used directly.

This is already the rule in deep diving, so everyone must remember this, and do not close the lid of the cylinder valve for the sake of aesthetics after using the oxygen cylinder.

In addition to these four survival systems, there is also a counterweight system when diving, which uses lead blocks to counteract the positive buoyancy generated by the body and certain equipment, and has a mechanism to discard some or all of the counterweight in an emergency.

The diving suit used in deep diving is a simple diving suit, which has no life-saving ability, so when encountering danger during deep diving, you must quickly release the counterweight system and rely on buoyancy to get out of dangerous waters.

Malins first taught them how easy it was to put on the equipment, then how to understand it, and finally how to maintain and repair it underwater.

The final stage is more troublesome, but it is a skill that must be mastered, otherwise the equipment will have problems in the deep sea, and if it cannot be restored to normal in time, it will often cause an existential crisis.

The training on equipment is over, and the next step is to get into the water.

There are generally three types of actions to enter the water, one is stepping in, one is backward, and one is sitting and falling into the water.

Malins explained to them the launching maneuvers used at different times and in different situations, not only when entering the water from the boat, but sometimes when entering the water at different depths, they had to change their posture halfway to adapt to the change in water pressure.

Dressed in gear, they gradually descended into the water.

Sophie, on the other hand, performed better during this period, she was like a mermaid in the water, and she had better control over her body balance, which is the advantage of female diving.

When Li Du dived into the water for about twenty meters, the mask suddenly began to bubble out and enter the water at the same time.

This made him secretly bitter in his heart, he didn't expect such an unfortunate thing to happen just after training, and hurriedly signaled to Malins, who accompanied him into the water, that there was a problem here.

Malins wandered around Hans, seemingly noticing him here.

Seeing this, Li Du had no choice but to keep a calm mood, turn on the counterweight system to release the lead block, and try to swim towards the water.

When he ascended, Brother Wolf also ascended, and then Malins followed with Hans and Sophie.

Li Du came out of the water and said to Brother Wolf who followed him: "You don't have to follow me, there is no danger here, you don't have to exercise the duty of a bodyguard." ”

The corners of Brother Wolf's mouth twitched twice, and he lowered his head and didn't speak.

Hans and Sophie then also surfaced, and Li Du asked curiously, "Why don't you train?" ”

Malins frowned and looked at the two of them, and said, "Mr. Lee and Mr. Wolfgang are very good, they found the problem in time, you two did a terrible job and didn't take my teaching to heart!" ”