Diving with noseclip has a huge benefit because we don't need to equalize the mask and we have both of our hands-free. They don't need to see better, they just want to keep their eyes covered.
This is also a reason why you can see some freedivers using just normal goggles without correction lenses. I always like to dive just with the noseclip and use as few things as possible, but this just makes my dives way more comfortable. The main reason why I'm using fluid goggles is to eliminate the stream of water passing across my eyes, because it makes me feel like I have to swallow. You can even read data from your computer if you need to. You can see the line, tags, lanyard if it gets tangled and so on. If you wear them under the water the correction lenses make our sight sharp. Some are using fluid goggles which are upgraded by correcting lenses. If you look at any competition you would see most of the freedivers diving just with the noseclip or with noseclip and goggles. We want to have perfect body position and just sink. We don't care what is there, there is just a depth we want to go. We want to be as streamlined as possible and we are not looking down. It's just the line with some stopper in the end. We are freediving on the line, we know where we go, and we know (or trust) there is nothing we can hit. And because we want to make our dive as easy as possible and eliminate mistakes or oxygen (air) consumption we are usually diving without a mask. That's about inner airspaces and that's what freedivers are usually very focused on during the dive itself and what is a big part of freediving training.
#Fluid mask training how to
In the first meters, it is usually the Frenzel technique or hands-free (if you know how to do it) and with greater depth mouthfill or Frenzel with reverse packing. It means we have to equalize all airspace we have in our head such as the middle ears and sinuses. The bigger the pressure, the smaller the volume and it is inversely proportional. With depth, the ambient pressure increases and compresses the air. And it costs some air, some focus, you need to know how to do it, it can cause some troubles and the result can be the end of your descent. But it is an airspace and you have to equalize it anyway. It simply means that we don't need that much air to equalize it and it doesn't cost us so much effort in comparison with bigger scuba diving masks which are not designed for freediving. Mask has a silicone skirt which allows it to change shape a bit while under the pressure. We can talk about semi-flexible airspace because the mask is soft. Mask is an airspace and we have to equalize it. With the mask, you can see as clearly as on the land.īut nothing is that simple. You have a mask now, you can see what is around, where you swim, you can observe the reef and watch sea creatures, take pictures, or hunt. But ok, it doesn't really matter and if you are freediving regularly, you will just get used to it.
It means the angle from which the rays of light reach your eyes is larger than in the air. The index of refraction of the water is 1,33, and of the air is 1. Objects just seem to be a bit bigger and a bit closer. As soon as we put it on our face, our eyes are in the air and we can see as if we are above the surface. The human eye is designed to focus light onto the retina, but underwater light bends twice and it causes the image to be formed somewhere behind the retina. The water has different densities and changes how the light travels which causes us to see blurry in the water. It's just noise everywhere around and you need to look up and scan the surface to avoid any collision. I guess you know this feeling when you are snorkeling, you are under the surface and suddenly you hear some boat coming. Hearing is much less here even if the sound travels a bigger distance because under the water we can not recognize from which direction it comes, and it is just noise for us.
We can move in all directions which looks like seeing is even more important. The water is a different environment and we would like to see what is there. We just want to see what is around us, what is in front of us, where we go, and so on. We as humans have some important senses which we need for living.
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