The diver underwriter is responsible for the partners and accompany (in an one-to-one debate) in the most dangerous zone (with 15 metres in the surface). The depth in which the underwriter will meet depends on the depth of this one, but anyway he shouldn’t be superior to 15 metres.
2. Never dive after diving. The nitrogen staying in cloths of the body after diving, followed by an immersion in apnea can cause the illness of decompression (DCS) – in the course of diving quick ascent in its blood of nitrogen are formed by microbubbles. In that case, the persons having a permeable oval foramen (Communication auricular inter) how it is called, are much more at risk. Remind that after diving is necessary to wait for 12 hours at least before you could dive in complete safety and breath.
3. Never be attracted by the force of your tympanums. Is only purged when the shutter release (about every 3 metres). Never dive by force. Never try to blow up, if it isn’t immediately to go out! Never blown on rise. If you use a pince-nez, at the beginning of ascent, it should be taken away. Useless heroism and style of installation: «I must get a 40-metre note!” is possible cause problems. If you succeeded in diving in 35 metres without feeling problems with the levelling out of pressure, but you can’t blow already in 38 metres, don’t try “to give a helping hand” until 40. Of course, the bottom seems to be so close, and the difference of pressure is relatively weak… But this impression is misleading. To try to overcome the remaining metres to earn figures, you risk breaking a tympanum with all its consequences – of vertigo and nausea.
4. Always choose correctly the quantity of the goods. Overloaded dangerous. It can cause problems with levelling out of pressure in the cavity during descent and oblige you in an additional effort in case of rise. He is particularly dangerous of the combination more fats for winter diving. One golden rule – your buoyancy must be neutral, in a 15-metre depth.
5. Before diving with a partner, drawing up a detailed plan and assessing conditions in sea. It is important that divings in free water, every diver, acting in his own plan, knew exactly what would the partner make in the course of this session of training – warm-up, diving, etc Which is going to assure and at which instant. To make this is an emergency. As sea conditions will affect the veloamateurs of diving and of security. For the list of following conditions: ongoing, visibility under the water, temperature of the water, waves, the distance of the beach and the intensity of the movements of transport of the water.
6. Abolish the pipe of its mouth. To its return to the surface of cleaning of the tubes of blow the water will drive almost indeed in a power failure (loss of conscience) when the approached diver his border. Besides, the presence of the tube in your mouth, it is difficult to line pressure up in depth and where shrinkage begins in membrane, can drive to the inhalation of the water.
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