Barnaby'sDad
Contributor
OP, if you literally only had one training day in the pool, my recommendation would be to call your instructor, bump the OW dive to another day, and get at least one more day of training in the pool.
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And the CO2 buildup will be further compounded by the increased WOB. An unpleasant recipe pretty quickly resulting in a CO2 hit I expect.Dominek_E suggested that extending the snorkel is not a good idea; in fact, it is a very bad idea. There is a reason that snorkel tubes are the length (and width) they are and not longer (and wider). Not only will it get harder to inhale if you go deeper with a longer snorkel, what you are inhaling will be largely your own exhaled CO2 that did not get eliminated after your last breath.
If you were to lie on the bottom of the pool in 3 feet of water and try to inhale through a tube, you could not do it. Your scuba regulator adjusts the pressure of the air coming out of the cylinder to a pressure a little higher than the pressure of the surrounding water; that is why you can breathe from it.
If you only had 1 pool sessions, instruction standards have not been met.
You're right. I glossed right over that.Yes, I understand but OP stated :"I had the first pool session".