Green_Manelishi:Just buy a regular snorkel (the KISS principle) and learn to use it properly.
There is no need to complicate a snorkel; all it does is make you look like
you've length of pipe attached to your head.
Definately good advice to follow the KISS principle. With that said:
-Divers reach for their snorkle mistakenly as a deflator and become task loaded and confused.
-Divers get hung up on their snorkle and flood their masks or worse rip them off their head.
-While diving a snorkle is a definately unneccesary entanglement point
-Snorkles definately interfere with the deployment of the 7' hose (not a concern for everyone).
-Snorkles serve no purpose whatsoever underwater. (Although I did see a divemaster in Cozumel use one to pin down a toadfish for a lazy photog.)
-It's way more effective to swim on your back and breath through your mouth then push all your gear forward through the water while breathing through a Co2 building straw with you on your stomach.
What good is a snorkle in heavy surf? The thing is max 12" high. If a wave washes over you..umm..well...stop breathing for a second. If you consider 1 foot waves heavy surf stay in your bathtub and sell your gear.
If you find yourself wearing a snorkle and aren't sure why except that your instructor told you so?....Get immediatly out of the water and stay out. Safe diving requires a reasoning and thinking individual and you aren't there yet.