18m dives around north or west Ireland

The original comment about a CESA from 12m was totally tongue in cheek and
aimed as a gag.

The whole point of a CESA or whatever any other agency want to call it is a
method for OOA divers to ascend to the surface without bursting a lung. This
is achieved by maintaining an open airway to the lungs in "PADI-speak"
making the AAAAHHHH sound. I doubt that a 50% increase in volume of gas held
in the lungs would be survivable. But a CESA from depth is possible if the
constant exhalation happens. I know of people that claim to have done a CESA
from 30m. It is a useful skill it is dangerous if incorrectly performed, but
so is drowning when you are OOA.

Sorry if I sound touchy about this thread, but the OP was new to the group
and asked a valid question and has been flamed so much that he has left.
Considering that this once high quality NG is in a membership decline was it
a good course of action?

This thread is also way off topic now.

Keith

The original comment about a CESA from 12m was totally tongue in cheek and
aimed as a gag.

The whole point of a CESA or whatever any other agency want to call it is a
method for OOA divers to ascend to the surface without bursting a lung. This
is achieved by maintaining an open airway to the lungs in "PADI-speak"
making the AAAAHHHH sound. I doubt that a 50% increase in volume of gas held
in the lungs would be survivable. But a CESA from depth is possible if the
constant exhalation happens. I know of people that claim to have done a CESA
from 30m. It is a useful skill it is dangerous if incorrectly performed, but
so is drowning when you are OOA.

Sorry if I sound touchy about this thread, but the OP was new to the group
and asked a valid question and has been flamed so much that he has left.
Considering that this once high quality NG is in a membership decline was it
a good course of action?

This thread is also way off topic now.

Keith

Matthias Voss wrote:
> Stimp wrote:
>
>> My buddy is only qualified to dive to 18m, are there any dive sites
>> around the north or west of Ireland you recommend we should try
>> out?
>
>
>
> You may be mixing up qualified and certified.
> Physic laws extend without step functions, even down to more than 18m.
> Just to state, this "you are only qualified BS" is only aimed to
> separate you from your cash.
> What counts, is not certification, but skills assessment, development
> and training.

What, I thought making that one dive to 20m on the PADI-AOW course meant
you were then qualified to dive to 30m. Surely this is so, PADI wouldn't
lie to me would they?

Matthias Voss wrote:
> Stimp wrote:
>
>> My buddy is only qualified to dive to 18m, are there any dive sites
>> around the north or west of Ireland you recommend we should try
>> out?
>
>
>
> You may be mixing up qualified and certified.
> Physic laws extend without step functions, even down to more than 18m.
> Just to state, this "you are only qualified BS" is only aimed to
> separate you from your cash.
> What counts, is not certification, but skills assessment, development
> and training.

What, I thought making that one dive to 20m on the PADI-AOW course meant
you were then qualified to dive to 30m. Surely this is so, PADI wouldn't
lie to me would they?

Matthias Voss wrote:
> Stimp wrote:
>
>> My buddy is only qualified to dive to 18m, are there any dive sites
>> around the north or west of Ireland you recommend we should try
>> out?
>
>
>
> You may be mixing up qualified and certified.
> Physic laws extend without step functions, even down to more than 18m.
> Just to state, this "you are only qualified BS" is only aimed to
> separate you from your cash.
> What counts, is not certification, but skills assessment, development
> and training.

What, I thought making that one dive to 20m on the PADI-AOW course meant
you were then qualified to dive to 30m. Surely this is so, PADI wouldn't
lie to me would they?

Matthias Voss wrote:
> Stimp wrote:
>
>> My buddy is only qualified to dive to 18m, are there any dive sites
>> around the north or west of Ireland you recommend we should try
>> out?
>
>
>
> You may be mixing up qualified and certified.
> Physic laws extend without step functions, even down to more than 18m.
> Just to state, this "you are only qualified BS" is only aimed to
> separate you from your cash.
> What counts, is not certification, but skills assessment, development
> and training.

What, I thought making that one dive to 20m on the PADI-AOW course meant
you were then qualified to dive to 30m. Surely this is so, PADI wouldn't
lie to me would they?

Matthias Voss wrote:
> Stimp wrote:
>
>> My buddy is only qualified to dive to 18m, are there any dive sites
>> around the north or west of Ireland you recommend we should try
>> out?
>
>
>
> You may be mixing up qualified and certified.
> Physic laws extend without step functions, even down to more than 18m.
> Just to state, this "you are only qualified BS" is only aimed to
> separate you from your cash.
> What counts, is not certification, but skills assessment, development
> and training.

What, I thought making that one dive to 20m on the PADI-AOW course meant
you were then qualified to dive to 30m. Surely this is so, PADI wouldn't
lie to me would they?

Matthias Voss wrote:
> Stimp wrote:
>
>> My buddy is only qualified to dive to 18m, are there any dive sites
>> around the north or west of Ireland you recommend we should try
>> out?
>
>
>
> You may be mixing up qualified and certified.
> Physic laws extend without step functions, even down to more than 18m.
> Just to state, this "you are only qualified BS" is only aimed to
> separate you from your cash.
> What counts, is not certification, but skills assessment, development
> and training.

What, I thought making that one dive to 20m on the PADI-AOW course meant
you were then qualified to dive to 30m. Surely this is so, PADI wouldn't
lie to me would they?

BarryNL wrote:

> What, I thought making that one dive to 20m on the PADI-AOW course meant
> you were then qualified to dive to 30m. Surely this is so, PADI wouldn't
> lie to me would they?

That's right. You were introduced to the problems of
deeper diving and given an excursion into that range
so you have the basic information to go and do it.

Below 30m narcosis become more evident (not to you)
and gas management becomes more significant but the
step from OW to AOW (18m to 30m) is not that
significant.

There isn't a huge difference between the two grades.
If there were the AOW course would be examined with
things you have to do rather than what are basically
'experience' dives.

30m isn't deep. Stand next to an eight or ten story
block of flats and look up and say to yourself.
"I've run out of air. I have to swim that far to be
able to breath again.". Easy.

nigelH

BarryNL wrote:

> What, I thought making that one dive to 20m on the PADI-AOW course meant
> you were then qualified to dive to 30m. Surely this is so, PADI wouldn't
> lie to me would they?

That's right. You were introduced to the problems of
deeper diving and given an excursion into that range
so you have the basic information to go and do it.

Below 30m narcosis become more evident (not to you)
and gas management becomes more significant but the
step from OW to AOW (18m to 30m) is not that
significant.

There isn't a huge difference between the two grades.
If there were the AOW course would be examined with
things you have to do rather than what are basically
'experience' dives.

30m isn't deep. Stand next to an eight or ten story
block of flats and look up and say to yourself.
"I've run out of air. I have to swim that far to be
able to breath again.". Easy.

nigelH