Chapter 751 750. Professional (4/5)

Chapter 751 750. Professional (45)

Generally speaking, free diving requires a diving certificate. Li Du and the others work, so a diving certificate is not necessary.

Marlins is a very responsible diving instructor. He strongly urged the four of them to obtain a diving certificate, because it is not difficult to obtain this certificate, and three days is enough.

"With my guidance, it won't take three days. If you study hard, then two days will be enough to get this certificate." Mullins said confidently to them.

Just like the driver's license test, the diving license test in Australia is also divided into several courses, namely theoretical courses and practical courses.

The two days that Mullins said was to get the results of the theoretical class, and the practical class would take more time, and he could pass the test by the way when he entered the water to study.

This is the benefit of paying a high price for a famous instructor study class. Mullins is also the proctor of the diving test, and he can sign their diving training form.

In this way, Li Du and others don't even need to go to the certification institution for reference, as long as they combine the results of the theory course, they can directly produce the certificate in the end.

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

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

Mullins' purpose is to lead the four of them to study theory lessons. When they are tired, he can take them to dive in the swimming pool, and master both snorkeling and deep diving skills by the way.

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

This kind of arrangement can help them save energy and time as much as possible, but it still requires a lot of physical energy, requiring the brain and body to work together.

The theory of diving is not difficult, mainly based on two books, namely "Open Water Diver's Handbook" and "Recreational Diving Planner Instruction Manual".

All four of them are college students. Brother Lang is considered a college dropout, but the university he attended is the most prestigious among the four. Back then, dropouts were needed to join the army.

Therefore, the four of them didn't have much pressure to study cultural courses. It only took one and a half days to follow Mullins to take the exam, and all cultural courses passed the standard.

They have been learning snorkeling for the past day and a half. All four of them can snorkel, but what they know is swimming. In fact, except for Brother Lang, the other three don't know snorkeling skills and experience.

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

Marlins taught them survival skills, and life-saving is the first requirement in everything.

Snorkeling is the basis of all diving. In fact, many skills of deep diving and free diving are derived from the snorkeling process.

When Li Du encountered the undercurrent of sea water, he couldn't control his body well, because his snorkeling ability was too poor. To pass the snorkeling ability, first of all, he could still swim freely in the turbulent sea water.

After two days of snorkeling training, and after the exam on the third day, Mullins took them to start deep diving training.

Although it was just training, Mullins still prepared a full set of tools and brought an assistant who was also a diving veteran to be responsible for the four of them.

The initial training is still carried out in the hotel swimming pool, and the depth of the swimming pool reaches 40 meters.

Standing on the edge of the swimming pool, Mullins explained to them: "Remember, you must first understand your equipment before entering the water. Equipment is what you rely on for underwater survival. They are more important to you than guns to soldiers."

"I told you about the wearing of masks, snorkels and fins when snorkeling, and now I want to specifically explain the scuba system."

"During deep diving, the scuba system is the core that supports your survival in the water. It has four equipment systems integrated into a single kit, buoyancy adjustment system, regulator, oxygen cylinder and weight system..."

He explained the scuba system to the four people in detail. There is an unspoken rule when choosing oxygen cylinders, that is, the cap of the cylinder valve of the commonly used oxygen cylinders is unscrewed and cannot be reinstalled after use.

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

This is already a rule in deep diving, so everyone is required to remember this point. After using the oxygen cylinder, it is not allowed to cover the cylinder valve for aesthetics.

In addition to these four survival systems, there is also a counterweight system when diving deep. This uses lead weights to offset the positive buoyancy generated by the body and certain equipment. There are mechanisms to discard part or all of the equipment in an emergency. Heavy.

The diving suits used in deep diving are pure diving suits and have no life-saving capabilities. Therefore, if you encounter danger during deep diving, you must quickly release the weight system and rely on buoyancy to escape from dangerous waters.

Mullins first taught them to wear the equipment, which was simple, then taught them to understand the equipment, and finally maintained and repaired the equipment underwater.

The final stage is more troublesome, but it is a skill that must be mastered. Otherwise, if something goes wrong with the equipment in the deep sea, if it cannot be restored to normal in time, it will often cause a survival crisis.

The training in equipment is over, and the next step is to go into the water.

There are generally three movements for launching into the water, one is stepping, the other is leaning back, and the other is sitting and falling into the water.

Mullins explained to them the launching movements at different times and under different circumstances. These movements are not only used when entering the water from the boat, but sometimes when entering waters of different depths, they also have to change their posture midway to adapt to the change of water pressure.

Armed with gear, they step into the water.

But Sophie performed better during the period. She was like a mermaid in the water and could better control her body balance, which is the advantage of female diving.

When Li Du dived into the water for about 20 meters, the mask suddenly started bubbling and water entered.

This made him secretly complain. He didn't expect such a bad thing to happen just after training, so he hurriedly signaled to Marlins who accompanied him into the water that he had a problem.

Malins wandered around Hans, seemingly oblivious to his presence.

Seeing this, Li Du had no choice but to keep calm, open the counterweight system to release the lead weights, and try to swim to the surface of the water.

When he floated up, Brother Wolf also floated up, followed by Marlins with Hans and Sophie.

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

The corner of Brother Wolf's mouth twitched twice, he lowered his head and said nothing.

Hans and Sophie also floated up afterwards, and Li Du asked curiously, "Why don't you guys train anymore?"

Mullins frowned and looked at the two of them, and said, "Mr. Li and Mr. Wolfgang are very good. They found the problem in time. You two did a terrible job and didn't take my teachings to heart!"