Another tip, use the search function and read, read, and read! I used this site quite extensively as a new diver and even now many years later for a great deal of clarification.
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similar thoughts, 15' is kind of arbitrary, but it's deep enough to be relatively easy to maintain buoyancy for new divers, and 15' is deep enough to keep you out of harms way for most boats.
The ascent rate should be more correctly stated as "no more than 30ft/min". The safety stops can also be completed if you are shore diving by meandering around at relatively shallow depths. These are again precautionary stops, not decompression stops, so if you have to blow it you can, though it doesn't hurt to hang out at that depth and play around for a few minutes. Good practice for mandatory deco stops if you get to that point later down the road.
If you are diving less than 30', you really aren't on-gassing enough to really off-gas enough at 15' to warrant the stop, if you're diving like 50+ then you want to make them, and the deep stop thing is starting to come out, but science isn't really behind it, so if you're diving square profiles to 80+ft, it doesn't hurt to ascent to 40', chill out for a minute, then ascent up to 15', and chill out for a few minutes. This is all within NDL's, and it's important during these stops to keep moving. Slow deliberate motions from your arms and legs help. You don't want to be actively moving so much as every once in a while make a stretching motion to keep the muscles moving to promote blood flow.
@TMHeimer: But as a new diver in two days, do you have the enough confidence to do the OW part ? Or you really need to practice more ? I am just asking I am a newbie.
Wild guess: Because the standard deco stop depths are 3m/10ft, 6m/20ft and 9m/30ft?There must have been a reason the shallower one was considered better at first.
I think I've read the same, and I can't remember where, either.Wish I could remember where I recently read it, but it seems that with no stop there is a fair bit of silent micro bubbling, with a 3 min stop a small amount of micro bubbling, and with a 5 min stop none - almost none. Of course all this applies to dives within NDL.
Quoted for truth. Anecdotes aren't data, but I noticed a marked decrease in post-dive fatigue - often ascribed to sub-clinical DCS and micro-bubbles in your system - when I started to routinely shoot a dSMB from my safety stop and follow the dSMB line up instead of what I often did before: cork from the last two meters.ascend from the SS as slow as you can manage - this is where the biggest volume change occurs.
Okay Okay i just want to have an idea...because my course is a two day weekend...and i am totally new with this. I have more questions ....oh well ....
I see a statement that says "ascent slowly, well within your computers ascent rate and make a safety stop at 5 meters/15 feet for three minutes or longer."
So, is this safety stop 5mts below surface ? Or above of my targeted depth while I am ascending.
Thanks for your help,