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Going to dive, you have to learn several skills
The mysterious underwater world is always aspire. Many outdoor enthusiasts are fascinated by diving. However, as a high risk factor activity, before real diving, some common sense you must know: The necessary learning of diving into the sea includes: The use of breathing tubes and regulators, methods of rest on the surface of the water, emergency handling, etc.

The preparation before entering the water is very important. Check whether the function of the equipment is normal and check with each other. Into the water position: frontal vertical diving - water depth needs to be more than 1.5 meters, open before and after the feet, one hand hold the mask, one hand press the air tube strap. Back seated into the water - facing in on the boat state, back into the water.

Positive seated into the water - for beginners to use. Sideways into the water - and then roll on the inflatable boat into the water. Submersion: B.C. (buoyancy mediator) method - When using a buoyancy regulator, with the counterweight belt, the dive under the head. Don't use B.C.- Rise: The rise speed is controlled within 18 meters per minute. Simply put, do not exceed the rate of rise of the air bubbles that you exhale. Do not stop breathing. When you rise, look up the water surface. You can extend the right hand to specify the direction. Note that the body slowly rotates. 

The following patients are not suitable for diving: colds, allergies, ear and nose diseases, heart disease, high (low) blood pressure, post-drunk, diabetes.
Differences between snorkeling and scuba diving: scuba diving is the method by which a diver carries an oxygen cylinder and breathes oxygen through the cylinder for long periods of time.

Snorkeling skindiving is a method in which a diver can breathe while swimming; it can be surfaced until it can no longer escape. The rules of scuba diving: The principle of two-person walk-in: Both must be together from entering the water to the shore; the coach must not allow the partner to go ashore on their own; the two always keep in touch.

Responsiveness when placing orders: Keep calm, float a few meters, and look for companions; when they are not found, they will surface and observe bubbles. After more than ten minutes, there are still no traces of companions and they should return to the place of entry. If it is not necessary, do not hunt animals in the water. Every ten meters check residual pressure gauge balance. Several kinds of universal gestures: I am in good condition - "OK", pay attention to (object) direction - "index finger indicates direction", go up - "right hand fist, thumb up", dive - "right hand fist , thumb down."

Adjusting ear pressure: For people who are not diving for the first time or diving, the pressure of the water can make the ear canal feel uncomfortable and even painful. At this point, apply the hand to hold the nose and forcefully blow into the nasal cavity to increase the air pressure in the ear canal and offset the water pressure. Then dive back, the pain in the ear canal is unbearable, and it should immediately go up.
 
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