The difference between Swimming goggles and diving mirrors

The difference between swimming mirrors and diving mirrors, the structure and principles of swimming mirrors and diving mirrors are different.

1. The diving mirror has a device with sealing nostril ventilation.

2. The sealing layout of the diving mirror is huge, and it is important to control gas and water density.

3. Differences in the scope of use and cover: The scope of the diving mirror is available underwater and the water, and the swimming moster can only be used on the water;Only cover the eyes and water isolate, and the water tightness is relatively bottom;

4. Differences for use: Diving mirrors are generally used with air respiratory Tube, diving respiratory and other supporting facilities. When used, they are generally required to use their mouth breathing gas.Use nostrils to breathe in the environment.The swimming moster does not have this requirement.

Therefore, the Swimming goggles cannot be used for diving mirrors, but there is no problem with the dive 5 meters 10 meters. If it is to play the bottom landscape of the island, you must get a diving mirror.In general, swimming mirrors and diving mirrors are firmly unable to replace each other.

How to choose swimming mirror and diving mirror

1. Choose the swimming moster

It is best to try the swimming moster. In addition to whether it depends on whether it is myopia, it also depends on whether there are cracks around the rubber ring around the mirror frame. Whether the elasticity of the Swimming goggles is too loose.There is a nasal buckle to increase, giving you the size.It is recommended to buy civilian goggles, because the civil frame has a rubber ring, which is more suitable for people who usually wear less Swimming goggles.

2. Selection of diving mirrors

a. Facial mirror style: single view window, double window.Single -view window mirror, the most visual field; the double -window surface mirror can replace myopia lenses, and the left and right degrees are different.There were too many window mirrors, but it is currently not popular, and the inner cavity space is too large.

b. The inner cavity space: the larger the inner cavity, the more restricts the field of vision. Pay attention to the inner cavity volume or test wearing in the manual, and feel whether the lens is closer to the face.

c. Whether it is suitable for your face: wear the previously selected facial mirror test, 45 degrees angle on the face, the facial mirror band to the front, buckle the face mirror on the face, the screen gas (can not exhale from the nose), reply to the face to replyOriginal, shake left and right, and see if the facial mirror is firmly sucking.If so, it means that the facial mirror fits your face.

Note: The snorkeling facial mirror and diving mirror are different.The lens of the diving facial mirror is performed over the water pressure test, which can withstand the pressure of 50 meters of water, and the snorkeling facial mirror generally onlyars the pressure of 10 meters of water.The edge of the diving facial mirror is made of silicone, and some snorkeling mirrors may be made of rubber, or there is a problem with the composition of silicone.When smelling the smell in the face mirror, the silicone should be tasteless. If the smell is pungent, it means that the material is wrong.The slight smell may be just the taste of talc powder on the silicone, and it should not be pungent. Please pay attention to the difference.

Disclaimer: The above content is derived from the provision of the program system index or the sharing of netizens. It is for your reference only and does not represent the research perspective of this website. Please pay attention to the authenticity and authority of the source of the content of the content.Apply to delete & gt; & gt; error correction & gt; & gt;

1. How far can the underwater thruster be battery life

The two sides of the Underwater propeller are equipped with a powerful propeller. Players only need to press the trigger button on both sides to hold the middle armrests in the underwater, and help you swim in the sea through the driving force generated by two powerful propellers.How far can the Underwater pusher be battery life?

The Underwater pusher design with buoyant block is used to bring the divers to the maximum depth of 50 meters (164 feet).The dual engine equipped with up to 12kg can be provided, allowing users to trigger the two sets of setting speed 3.6 km/h and 7 km/h by fingers.In addition, after charging its 24V/6000-MAH lithium battery pack for 1.5 hours, its battery life can reach one hour, which means that the maximum battery life is 7 kilometers.The indicator allows users to know the power situation.(Different brands, different endurance capabilities, it is recommended to check the instructions to obtain specific data.)

2. Can the Underwater propeller be life -saving?

I have briefly learned about the endurance of the Underwater pusher. Then let's see if the Underwater pusher can be life -saving?

Underwater pusher can be used for fire emergency rescue, underwater operations and exploration, tied to the waist, liberating the divers with both hands, can continue to provide the user with the purpose of the water underwater to achieve the purpose of rapid movement.On the water surface, users can easily control the direction by changing their own posture, so as to quickly save their lives.

1. What is the electric surfboard

Electric surfboard is a surfboard driven by lithium battery.A built -in lithium battery can provide the motor for about an hour of kinetic energy.At first, the surfing board was used for entertainment, but it was favored by the rescue team and lifeguards soon. The cost of this weight water Tool is low, which is more convenient than ships and jet boards. It can be used for rescue.

2. What is the principle of electric surf board

I have briefly understood what the electric surfboard is, so let's take a look at the principle of electric Surfboards together.

The shape of this surfboard is very peculiar. In addition to the "deck" standing, a longer rod is connected below, and a small water wing is installed at the bottom of the pole.

This wing is the core component of the electric surfboard. It looks like the wing of an airplane. Using the principle of Berinley, the place with a large flow rate is small, so on both sides of the wing wings, it can form obvious pressure pressure on the wings.Difference.

Then under the drive of the propeller, the surfboard can slide forward. When the speed becomes larger, the pressure difference between the sides of the wing wings will increase, so that the surfboard can be lifted out of the water surface.Like "flying" on the water, the operator only needs to master the balance, and the control of speed and direction can be achieved through the remote control in the hand.

Having a sailing boat means to have a city -state that lives independently and freely at sea; with a sailboat, you can enter a port of any port on the sea ...Some people who get up are not an excessive price.However, so far, the sailboat is still a game that is only played by a small number of people in Mainland China.

1. Sailing equipment

As the so -called work is good, we must first benefit its instrument.When it was really going to sea, there was no professional sailing equipment.Due to its special environment, the sailing movement needs to be armed throughout the body.Sailing clothes, ropes, sunscreens,Sunglasses... Every detail may affect your progress of learning to control sailing.Therefore, don't forget to check the equipment before boarding the Ship.

Voyage

The weather on the sea is easier to change than the shore, so it is very important to wear and equipment correctly in this sport.You don't have to spend a lot of money on the equipment. Here is some simple guidance for your basic equipment:

Wear loose clothes.It takes a lot of movements to operate the sailing boat, so wearing can give you enough clothes for you

Carry extra clothes in luggage Bags.In order to add clothes or wet water when cold, you can change your clothes.

Wear light and breathable clothes in hot days.It is best to wear light -colored clothes. The clothes you lead can protect your neck from exposed to sunlight. The clothes with long sleeves can protect your arms from exposed to sunlight.

Use sunscreen (SFP15 or higher) to protect your Skin, and even so on a cloudy day, it is best to apply it frequently.

Wear a hat to protect your eyes and make your head from being shined with sunlight.In cold days, wearing a hat can warm the head.

Wear Sunglasses (at least 90%).Polarized mirrors can greatly reduce the dazzling feeling of water.

You must wear anti -slip shoes.In order to stand on the slippery deck.tennis shoes that are not broken sole will be a good choice. Of course, sailing shoes are the best choices, because the soles of the sole

The rubbing force is very large and dry very fast.Don't wear sandals or other toe shoes, sooner or later you will hurt your toes.

waterproof navigation boots will keep your feet warm and dry in cold days.

Daihang sea gloves can prevent your hands from being scratched and increase friction.It is best to wear waterproof gloves in cold days.

Lifeline is a must -have equipment for navigation.The life jacket should be fitted and has quality assurance.

Wear a few more layers in cold days.When you feel cold, your operation skills will be greatly affected, so wearing a few more clothes is a wise choice.Avoid wearing cotton clothing, wear

Clothes that can still keep warm after wet, such as cortex or polyester fiber clothing.Dedicated cold prevention clothing, dedicated cold -proof clothing can keep you warm and dry in bad weather.There are several styles to choose from:

Standard two -piece set, including a waterproof jacket with a hat pocket and an independent suspender pants.

Conjusational clothes will make you more dry, but you cannot take off your shirt or pants alone to adapt to changes in temperature.

On some particularly humid ships, crew members often wear wet warm clothes similar to divers.

Dry -style warm clothing is a suit that allows you to isolate water. They seal your neck, wrist and ankle tightly.They can prevent water and keep warm.

Safety equipment

In addition, there should be complete safety equipment on the sailing.Safety equipment not only protects Ship equipment, but also protects individuals. The crew must know the location and correct use of these equipment in order to prevent accidents during the movement.Sailing needs to prepare the following safety equipment on sailing on the shore:

Safe vests -Each person must have a qualified life -saving vest, and children must prepare special size life vests for them.

Life Rings -placed on the Ship that is easy to get on the boat, and once someone falls into the water, it can quickly throw it into the water fall.

FIRST AID Kit -Applicable first -aid drugs and items.

Bilge pump -manual or electric pump, which can quickly discharge the chamber water.

Bucket (bucket) -The rope of about two meters can be used urgently when the cabin is in water.

In addition to the above, if you want to travel long, you can also prepare excess anchor cables, waterproof flashlights, fire extinguishers, Gangpu, Haitu, signal bullets, wide -leaf short paddle, drainage equipment, horn, compass, sufficient water, knife, pliers, pliers, Screws, rolls and other tools to prepare from time to time.

First boarding

For the first time to board the Ship, pay attention to boarding etiquette. First of all, the captain's consent can only be boarded, just like invited to enter the house of others.When boarding the Ship, you should be very careful, especially when you are low tide, use a ladder or connect to the large boat by a small boat or a small boat. When crossing the side cable, you should cross the back to maintain the center of gravity of the body.Proper locations and prevent the hull of the hull may move into the water.

The sailing club often keeps tilting or suddenly unpredictable, especially for beginners who are not accustomed to activities on the tilted Ship.The string cable, the top pole of the cabin, or any fixed devices on the Ship can help you stand firm.When walking around, the body is slightly bent and walks, keeping the center of gravity, and be careful not to hit the horizontal pole or let it hit you.Walk on the deck to keep on the upper side for safety.

2. Small boat site and instructions

1. Former sail (jib): sail used in front of the main mast.

2. HeadStay or Forestay: The top of the mast can be pulled forward to the front boat, and the steel cable on the front sail can be buckled.

3. SHEET: The main control of the rope can be released or tightened and fixed. This picture refers to the front sail.

4. Mainsail: The largest sail that is raised after the main mast is also the source of the main power of the entire sailing boat.

5. Battens: The flat bars inserted from the back edge of the sail, in order to maintain a good sail shape.

6. MainSheet: Rope to control the angle of the main sail.

7. Boom: elongated, used to fix the bottom of the main sail.

8. BOOMVANG: The cable tightened or supported by the sail truss to prevent the sailing truffle up.

9. Mast (MAST): The long rods made of wood or aluminum are supported by steel cables for lifting and stretching sails.

10. SHRouds: The tension used to fix the side of the mast.

11. Centerboard: Under the hull, you can adjust the depth of water (mainly axis -based heart, front and rear lift).

12. Rudder: The device used to control the Ship in the direction.

13. Boat (BOW): The front of the hull.

14. Stern: The last part of the hull.

15. Hull: The shell of the Ship.

3. Preparation before playing sailing

1. Operation basis

(1) Look at the basic knowledge of sailing, understand what the sailboat is driving, and see the relationship between the wind, sail and boat in all directions, see the basic chapter of the sailboat in the forum technology post.

(2) Keep in mind the basic guidance and safety reminder of the teacher before launching. Sailing is a sports Tool with safety knowledge, including wearing a life jacket to understand the use of safety equipment. Pay attention to the difference between the boat and the big boat from the preparation of the Ship on the dock.To control the balance of the boat and your own center of gravity, it is generally necessary to quickly move the Ship to move the center of gravity to the center of the Ship to avoid the boat cover.Check whether each rope is in normal state.

(3) After boarding the Ship, pay attention to lift the sails because of the cooperation, and the boat can generally rise on the shore.

(4) After sailing, safely leave the dock.To judge the direction of the wind first, you can generally judge through the wind direction indicator on the boat or the wind line tied to the side branches. Generally, the range of 45 degrees in the direction of the wind is the range of 45 degrees.Sailing, of course, to adjust the angle of sails from the perspective of wind.

(5) After a period of familiarity, we can master the basic operation of the former sails, and start learning how to take the helm. The boat we learn is the rudder of the pushing rod. It is more sensitive than the rudder wheel.Basic driving in turn to understand the relationship between wind, front sail, main sail, main sail, Ship's order and rudder's sense of rudder, and can basically understand the basic essentials and feelings.

2. Important angle

(1) Wind direction angle: The term for sailing motion sailing, refers to the angle between the wind between the end of the same sailing boat.The motivation of the sailing Ship mainly depends on wind power.And the size of the wind direction to the promotion of sailing is very important.Athletes must correctly grasp the wind direction and angle in order to fully use the wind to drive sailing.

(2) Different wind direction angle divide the degree

The wind direction angle of the top wind is between 0 degrees and 30 degrees; the wind direction angle of the front wind is between 30 degrees and 60 degrees;At 80 degrees 1 100

Between degree; The wind direction angle of the Smooth wind is between 100 degrees and 170 degrees; The wind direction angle of the tail wind is between 170 degrees and 180 degrees.

3. Sailing knot

Since ancient times, skilled use of knots is one of the very important sailing skills, because it will save the life of the crew.Different use cables use different materials.Due to the high tensile strength, nylon rope can be used as anchor rope or a boat rope.Dakun has little resistance and can be used as a flag rope or main sail.Polypropylene can float and can generally be used as a tie rope.

(1) Single knot.The wide range of uses can prevent loosening.

(2) Lilac knot.It is not a very strong way of knotting, which can be used as a short -term link.

(3) 8 -character knot.Used for the top of the flag rope or main sail.

(4) Rolling knot.Used to connect with coarse cables.

(5) Horn knot.Used to connect the cable angle of the same system.

(6) Two halves.Used for the same column, ring, etc.

It is also important to exercise the skills to handle cables.First of all, take the cable carefully.Before handing, the disk is divided into two parts.When throwing the smaller part of the cable, you need to keep the hand shape so that the other half of the cable is naturally pulled out in the other hand.

Recommended reading

[List of Outdoor equipment] Models that the must -have for outdoor sports must know

What are the gliding umbrella sports equipment? What should I prepare?

What kind of off -road Running equipment list is needed for Outdoor off -road Running

Outdoor cave equipment list, cave cavity equipment Daquan

1. Who invented the surfing board

The first design revolution in the surfing board appeared in 1926. A man named Tombraker invented the hollow board, applied for a patent, and became a surfing celebrity at that time.In fact, this is the improved Euro board. He made a lot of holes on the mahogany to reduce light weight, and then sticked a thin wood piece on both sides and waterproof.Holding it may be like holding a sister paper.At the beginning, many Hawaiians laughed at him and called this plate called 'cigar plate', but when they saw the performance of this board, they didn't say anything.In 1930, the board began to mass production. In 1935, he invented the board fin, which greatly improved the stability of the board.

2. What is the development history of surfing boards?

The surfing board was about 5 meters long and weighing 50 to 60 kg.After the Second World War, a foam plastic board appeared, and the shape of the board was also improved.The surfing board is 1.5 to 2.7 meters long, about 60 cm wide, 7 to 10 cm thick, flat and flat, the front and rear ends are slightly narrow, and there is a stable tail fin at the rear.In order to increase friction, there is a waxy outer membrane on the board.The weight of all surfing boards is only 11 to 26 kg.

There are some ripple structures on the front side of the whale wings, which helps this behemoth to move forward in the water more elegantly and smoothly.This structure can help reduce resistance and help the humpback whales "seize" the water flow, so as to ensure that it can still act quickly although it has a huge body.Inspired by this, surfing board producers produced a ripple -like front end of the surfboard.