![\"DSC04259\"](\"https:\/\/www.divetalking.com\/wp-content\/uploads\/2009\/11\/DSC04259-250x187.jpg\")
\nWhat I mean in my Title is mixing processes
\nof two different types of diving sometimes
\ndo not\u00a0blend well together. During my Open
\nWater training and all training in between
\nOW and Instructor, I have been taught to
\nopen the valve of the tank all the way, then
\napprox. 1\/4 turn back.<\/p>\n
During my Close Circuit Rebreather, CCR
\nrebreather training, I was taught to open the valves, just until they are open and stop.
\nThe reason for this is in an emergency, if for example the Oxygen begins to freeflow
\ninto the loop, you must address \u2018the problem\u2019 and get back on the loop. One way to
\nstop O2 from free flowing is to turn off the O2.<\/p>\n
If you are at 180 feet, you can see the danger of your O2\u2019s PPO spiking UP.
\nAnyway, if the O2 valve was turned ALL the way Open and 1\/4 turn back, the
\namount of time it would take to turn off the O2 (when compared to a valve opened
\nenough to allow O2 out) would be greater than.<\/p>\n
The Scenario<\/strong>: I remember saying to myself, \u201cExhale.. Exhale..\u201d and the air comes out naturally Oh yes, with the valve fully opened and 1\/4 turn back<\/p>\n The Lesson<\/strong>: Remember, Nothing substitutes for proper training. See your local instructor and What I mean in my Title is mixing processes
\nSome friends and I decide to execute a cavern dive.
\nI figured I would shoot some video while they do what ever it is they came to do.
\nI turn on my Open Circuit Cylinder by cranking the valve until my hoses charged
\nand I stopped opening the valve. I test the regulator and all seems fine. I instruct
\nthe folks to give me 5 minutes in the hole before coming in. So enter the shaft to
\nabout 20 feet, then into the cavern I go. I went in to setup myself, my camera and
\nthe lighting. During this I was bumping up against the ceiling
\n(Still trying to get my bouyancy too), I went to take a breath and NO AIR. Hard as
\na rock, like sucking on your wrist. Nothing. So I litterally thought to myself, \u201cHuh?\u201d
\nand I tried for another breath\u2026 Nothing. \u201cWhat the \u2026 Hmm. OK, what do I do?\u201d
\nNow all these thoughts are occuring in miliseconds. I was not scared, afraid,
\nanything like that. I remained calm and said \u201cHey, theres the exit, there\u2019s light\u201d and
\nI swam for the exit. As I reached the floor below the exit 20 feet above me I look up
\nand I see the other divers, still on the surface, looking down at me. I give the out of
\nair sign and head up.<\/p>\n
\n(I believe my rebreather training helped my experience this expansion of air –
\nI\u2019ll explain that in a different post). When I reached the surface, I gobbled up a
\nlung full of air and orally inflated my BCD.
\nDiscovering my air valve was OFF, we turned it on and I spend the rest of the
\ndive taking video of\u00a0the exploration.\u00a0<\/p>\n
\nMixing techniques from two different types of diving may not blend well together.
\nIn this case, the use of a Closed Circuit Rebreathing System vs. the Open System
\nof cracking open the valve vs. fully opening the valve.\u00a0<\/p>\n
\ndive shop for professional experience and guidance.<\/p>\n","protected":false},"excerpt":{"rendered":"
\nof two different types of diving sometimes
\ndo not\u00a0blend well together. During my Open
\nWater training and all training in between
\nOW and Instructor, I have been taught to
\nopen the valve of the tank all the way, then
\napprox. 1\/4 turn back.
\nDuring my Close Circuit Rebreather, CCR
\nrebreather training, I was taught to open the valves, just until they are open and stop.
\nThe reason for this is in an emergency, if for example the Oxygen begins to freeflow
\ninto the loop, you must address \u2018the problem\u2019 and get back on the loop. One way to
\nstop O2 from free flowing is to turn off the O2.
\nIf you are at 180 feet, you can see the danger of your O2\u2019s PPO spiking UP.
\nAnyway, if the O2 valve was turned ALL the way Open and 1\/4 turn back, the
\namount of time it would take to turn off the O2 (when compared …<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17],"tags":[],"class_list":["post-218","post","type-post","status-publish","format-standard","hentry","category-training"],"yoast_head":"\n