Summary
The technique of scuba mask drainage is one of the most important safety techniques in the assessment of calm waters for divers in PADI open waters. In the actual diving process, the water in the diving mask will lead to the discomfort of eyes, nose and other symptoms. If the basic essentials of this operation cannot be mastered, it may also cause adverse consequences such as choking water. Before the scuba mask drainage course, let's first understand its principle: the scuba mask was originally a cavity, and the entry of water occupied the air position, so we need to drain the water. As the air is lighter than water, it will overflow from the upper lip of the mask, so we need to hold down the upper edge of the mask, and at the same time, the nose will give out air, forming a picture of air driving water.
Decomposition of operation points
Step 1: water injection in the diving mask
Simulate the water entering the diving mask, hold the upper lip of the mask to form a fold (or directly lift the upper lip with your finger), and fill the mask with water slowly. You can lower your head slightly, let the water fill along the diving mask, to avoid direct contact with the skin, causing discomfort.
Step 2: press the upper edge of the mask with your fingers
Press the upper edge of the mirror frame with both hands and fingers or one hand, and press the finger force to the face. It is not allowed to press or hold the whole submersible cover frame, which will cause the water unable to be discharged.
Step 3: raise your head and exhale with your nose at the same time
First of all, lower your head and slowly raise your head while exhaling from your nose, so that the water can be completely drained, otherwise it will not be completely drained. It must be noted here that it must be the nose. Some students will vent together with the nose and mouth. In this way, the efficiency will be reduced, or forget to vent with the nose, or vent with the mouth. It must not be possible.
How to prevent water from entering the diving mask
Step 1: choose the material of the diving mask
High quality silicone petticoat can fit face better. In addition, the soft silicone material can provide maximum comfort for divers and avoid unnecessary facial movements caused by discomfort in the water.
Step 2: choose a mask suitable for your face
The way to choose the right mask is for the diver to press the mask on his face without wearing the mask belt, inhale slightly and hold it. If the mask fits tightly to your face, it means that the mask fits well with your face. If the mask itself does not adhere to the suit, even if the mask belt is tied tightly, it will only cause more compression, discomfort and tension.
Step 3: comb your hair
Make sure that the scuba and sideburns are not pressed when wearing the scuba mask, which will affect the fit between the scuba mask and the skin. Women in particular need to pay attention to, hair must not be fluffy, messy. In addition, male divers should also pay attention to the fact that facial whiskers can also cause leakage of the mask in people or at the bottom of the nose.
Step 4: keep calm
After the diving mask enters the water, you may encounter the following problems, please keep calm, and then you can easily handle them: your eyes may be stimulated, blink easily to make them secrete tears, and then you can recover; do not inhale with your nose in panic, just slightly raise your head and exhale when draining.
