Diving light equipment Sambo: mask, breathing tube, ankle

To dive will need to use diving equipment, simply speaking, diving equipment can be divided into light equipment and heavy equipment two types. Light equipment refers to the mirror, breathing tube and ankle - diving treasures, you have these equipment when you snorkeling, and scuba diving also requires heavy equipment, refers to the buoyancy control device (BC ), breathing regulators, diving instruments, cylinders, etc. Diving equipment has numerous styles and colors. You can choose different characteristics of equipment according to the form, purpose, your preferences and physical characteristics of diving.

Mask - the window of the underwater world

Trying to open your eyes in the water, you can see only a blur of sight. This is because the density of water is greater than air, and the light will refract in the water. The focal length of the eye is adjusted according to the light in the air. Therefore, the mask keeps the cavity in front of your eyes, giving you a clear line of sight. The biggest difference between the mirror and the swimming goggles is that the former masks not only the eyes but also the nose. This is because the pressure in the nasal cavity needs to be balanced in order to prevent squeezing. Therefore, the swimming goggles cannot be used for diving.

The general mirror is composed of reinforced safety glass lenses, a rubber- or silicone-clad edge of a fitted face, and an adjustable headband that can be fixed. Reinforced safety glass lenses prevent broken glass fragments that are highly dangerous. The silicone material of the group edge is stronger than rubber. This is because silicone is 3-4 times more durable than rubber, and it is not easy to make the skin allergic and soft and comfortable. Some mirrors have a drain valve, which is a one-way valve to eliminate water in the mirror. The two most important points in choosing a mirror are suitability and comfort, as are other devices. An inappropriate mask may leak and may cause allergies, reducing the joy of many diving.

Test mask is appropriate or not, as long as the mirror gently on the face, (without wearing a headband) and then inhale with the nose, the appropriate mirror will be close to the face until you exhale. Another point to note is that you can easily pinch your nose outside the mask. Mirrors are available in a wide range of styles, including single lenses, two lenses, and multiple lenses. Usually, only two lenses are equipped with lenses that can correct vision.

Before the first use of the mirror, gently wipe the two sides of the lens with a soft cloth moistened with toothpaste to remove the protective film. After each use, the mirror needs to be thoroughly cleaned with clean water, placed in a dry and ventilated place, and protected from direct sunlight. If you are using a mirror in seawater, it's best to soak it in warm water for a few minutes to prevent corrosive salt scales from forming. If you cannot clean it immediately after use, it is best to place the mirror in the water, because it is difficult to completely remove the salt that has been removed.

Breathing tube - easy breathing

You may think that since scuba diving has cylinders and regulators, why is the breathing tube one of the standard equipment? Because, first of all, when your water surface is resting or swimming, when your face looks down or finds something in the water, you can breathe through the breathing tube to reduce the air consumption in the cylinder. Second, when there is wind and water on the water surface, the height of the nozzle that can use the breathing tube is usually higher than the height of the wave to avoid pouring water into the mouth. Third, if you run out of water from a boat or on the shore, and the air in the cylinder is running low, the breathing tube will make it easier for you to swim back to the boat or shore. Your face can naturally be placed in the water. When snorkeling, the breathing tube is a necessary equipment, you can not look up and stay in the water for a whole day. Try it.

A typical snorkel design has one end open and the other end is a mouthpiece with a mouthpiece. The upper half (tube body) of the breathing tube is usually a semi-rigid plastic tube, and the mouthpiece of the lower half is mostly made of silicone. A suitable breathing tube should have a proper curvature (for your own face), about 2 cm inside diameter and 30 to 35 cm in length. The proper breathing tube is easy to breathe except for comfort. During the trial, the mouthpiece can be placed between the lips and the teeth, and the body can be leaned in front of the left ear. The mouthpiece should be suitable for comfort, will not scratch the mouth or cause chin fatigue, and is contained in the mouth is straight of.

Ankle - provides powerful forward momentum

The wide area of ​​the ankle can provide you with a powerful power, so that you do not have to rely on the two hands to generate power, so that both hands can be liberated to perform other work. The ankles are mainly divided into two types: non-heeled and footed. Set foot feet are generally used for warm water or snorkeling. No feet and feet to use with diving boots. Large and hard ankles are quick to use but tend to fatigue and cramps; small, soft ankles lack the power to push.

The ankles have different materials, designs and characteristics. The design of the ankle includes: keel, used to increase the hardness and balance of the ankle; drainage holes, reduce the resistance to the ankle to increase efficiency; diversion ditches, so that it slides horizontally over the ankle, increasing speed. Choosing your ankle depends on your size, strength, and diving environment. It's important to be comfortable and fit.