wnissen
Mouseketeer
- Joined
- Jan 5, 2003
- Messages
- 453
I figured I would take some pictures of my dry snorkel to help explain how it works. This is the body glove I mentioned above, available for $20 :
The image on the left is an open snorkel. The curved hole just below the words "desert dry" is the air intake. You can see that it is mostly shielded from sea spray and, ahem, non-marine animal splashes. However, it is not as sealed as the large round version.
The picture on the right is what happens when you get underwater When water reaches the bottom of the snorkel tip, a small piece of styrofoam (visible in the right-hand picture as the pale square in the middle of the picture) floats in the water and closes the air intake. Note that it does this before the water gets to the air intake, because the water floats the styrofoam below the intake.
Any dry snorkel is going to have some kind of gadget on the top. I agree with the other posters that the "U.S. Divers" snorkel is not a dry snorkel.
Walt
P.S. The picture on the right was taken upside down, so the valve would activate. Primitive trick photography!
The image on the left is an open snorkel. The curved hole just below the words "desert dry" is the air intake. You can see that it is mostly shielded from sea spray and, ahem, non-marine animal splashes. However, it is not as sealed as the large round version.
The picture on the right is what happens when you get underwater When water reaches the bottom of the snorkel tip, a small piece of styrofoam (visible in the right-hand picture as the pale square in the middle of the picture) floats in the water and closes the air intake. Note that it does this before the water gets to the air intake, because the water floats the styrofoam below the intake.
Any dry snorkel is going to have some kind of gadget on the top. I agree with the other posters that the "U.S. Divers" snorkel is not a dry snorkel.
Walt
P.S. The picture on the right was taken upside down, so the valve would activate. Primitive trick photography!

