Anyone still use Dive tables?

Was working my way through my course work last night and finally figured out
the dive table for repetitive dives, I THINK. but can anyone explain to me
what, on the third table, is the lower number used for e.g. 25/135. I
understand using 25 plus your dive time to get your new group BUT what do
you use the lower number for???

Also how many people still use the dive table? or do you really on your
computer? I was thinking that even if the table says 50 min at your depth
it's more important to watch you SPG?? Right or wrong?

Newbie...

"HotRod" <NoSpam@YourEmail.com> wrote in message
news:12fdsalhui4ddd9@corp.supernews.com...

> Was working my way through my course work last night and finally figured
> out the dive table for repetitive dives, I THINK. but can anyone explain
> to me what, on the third table, is the lower number used for e.g. 25/135.
> I understand using 25 plus your dive time to get your new group BUT what
> do you use the lower number for???
>
> Also how many people still use the dive table? or do you really on your
> computer? I was thinking that even if the table says 50 min at your depth
> it's more important to watch you SPG?? Right or wrong?
>
> Newbie...

Take a class. You'll learn all this stuff.

Taking a class hence the reason I ask. Wonder what real world experience is?
I find like most courses there is the "theory" and then there's the
"practice".


"Greg Mossman" <mossman@qnet.com> wrote in message
news:12fdu3pmrpm7721@corp.supernews.com...
> "HotRod" <NoSpam@YourEmail.com> wrote in message
> news:12fdsalhui4ddd9@corp.supernews.com...
>
>> Was working my way through my course work last night and finally figured
>> out the dive table for repetitive dives, I THINK. but can anyone explain
>> to me what, on the third table, is the lower number used for e.g. 25/135.
>> I understand using 25 plus your dive time to get your new group BUT what
>> do you use the lower number for???
>>
>> Also how many people still use the dive table? or do you really on your
>> computer? I was thinking that even if the table says 50 min at your depth
>> it's more important to watch you SPG?? Right or wrong?
>>
>> Newbie...
>
> Take a class. You'll learn all this stuff.
>

"HotRod" <NoSpam@YourEmail.com> wrote

> Also how many people still use the dive table? or do you really on your
> computer? I was thinking that even if the table says 50 min at your depth
> it's more important to watch you SPG?? Right or wrong?

A few of use never use a computer, using either personalized tables cut
from a program or conventional tables. I personally haven't used a dive
computer in four to five years, using a standard table with adjustments
(deep stops added, END for 32% if used, oxygen deco if used). When I do
more longer decos, I'll use a program.

Personally I have no use for one, however cannot fault those with the
dive understanding to use one as a tool, not a crutch, for those multiple
dive days (Lee).

Important to watch both gas supply and dive time.

Curtis

"HotRod" <NoSpam@YourEmail.com> wrote:
>but can anyone explain to me
>what, on the third table, is the lower number used for e.g. 25/135.

There is no such thing as THE third table. It would be useful
if you mentioned whose table you're using. I use DCIEM tables
and don't see what you're describing. Your table itself should
tell you what the second number means. It's probably the max
dive time at that depth for no-decompression. Check on that,
though. Don't dive on a guess.

>Also how many people still use the dive table?

I use the dive table for planning. It gives me the worst-case
numbers and lets me plan an appropriate surface interval. If I
actually dive to the max depth, stay there, then ascend, my
profile will approximate the tables. If I end up spending some
of that time at shallower depths, then I'm likely ahead of the
tables and my next dive (per plan) should work easily.

--
Ron
(user ron
in domain spamblocked.com)

HotRod wrote

> Was working my way through my course work last night and finally figured
> out the dive table for repetitive dives, I THINK. but can anyone explain
> to me what, on the third table, is the lower number used for e.g. 25/135.
> I understand using 25 plus your dive time to get your new group BUT what
> do you use the lower number for???

It took me a while, but I finally found a PADI table I could read . . . sort
of. I still didn't find 35/135, but I think I found what you're looking at.
If so, the information you are looking for is on the lower right hand
portion of the tables. If what you're looking at is what I'm looking at,
the 135 is the maximum no decompression time for the repetitive dive depth
you selected.

Lee

Hotrod,

I expect you to use de PADI Recreational Dive Planner (RDP), where the
second number gives you the corrected maximum bottom time.

There should be explanation ON the table itself though if it is the RDP.

I understand you are informing while doing your homework, but keep asking
the next class until you fully understand and then make quite a few
examples. Also plan at least your first 30-50 dives and calculate pressure
groups, surface interval and residual pressure groups for next dives, before
relying on any computer or whatsoever. Computers may malfunction. How would
you tell if you had absolutely no idea?

Planning a dive is btw ALWAYS necessary, just to make sure you have enough
gas to complete your dive, know when to start swimming back to entry instead
of a bit further etc.

Welcome to the club. Diving is great!

Frank
(DCM-divers do it deeper, stay in longer and get out wetter. Satisfaction
guaranteed)

"HotRod" <NoSpam@YourEmail.com> schreef in bericht
news:12fdsalhui4ddd9@corp.supernews.com...
> Was working my way through my course work last night and finally figured
> out the dive table for repetitive dives, I THINK. but can anyone explain
> to me what, on the third table, is the lower number used for e.g. 25/135.
> I understand using 25 plus your dive time to get your new group BUT what
> do you use the lower number for???
>
> Also how many people still use the dive table? or do you really on your
> computer? I was thinking that even if the table says 50 min at your depth
> it's more important to watch you SPG?? Right or wrong?
>
> Newbie...
>

"HotRod" <NoSpam@YourEmail.com> wrote in message
news:12fe9ieli1muv17@corp.supernews.com...
> Taking a class hence the reason I ask. Wonder what real world experience
> is? I find like most courses there is the "theory" and then there's the
> "practice".

In theory, we don't top-post here. In practice, we don't either.

> "Greg Mossman" <mossman@qnet.com> wrote in message
> news:12fdu3pmrpm7721@corp.supernews.com...
>> "HotRod" <NoSpam@YourEmail.com> wrote in message
>> news:12fdsalhui4ddd9@corp.supernews.com...
>>
>>> Was working my way through my course work last night and finally figured
>>> out the dive table for repetitive dives, I THINK. but can anyone explain
>>> to me what, on the third table, is the lower number used for e.g.
>>> 25/135. I understand using 25 plus your dive time to get your new group
>>> BUT what do you use the lower number for???

Real-world, or theory? Take the class first.

>>> Also how many people still use the dive table? or do you really on your
>>> computer? I was thinking that even if the table says 50 min at your
>>> depth it's more important to watch you SPG?? Right or wrong?

It's always important to check your SPG. It's always important to dive
according to your tables or computer. Failure to do one or the other can
lead to death, so they're equally important.

Most avid recreational divers (i.e. divers that own their own gear and use
it) use computers because they are much more practical than tables. Some
avid recreational divers who also tech dive claim to be able to dive
recreationally without using computers, but the rest of us are just waiting
for them to get bent so we can say we told you so.

"HotRod" <NoSpam@YourEmail.com> wrote in message
news:12fdsalhui4ddd9@corp.supernews.com...
> Was working my way through my course work last night and finally figured
out
> the dive table for repetitive dives, I THINK. but can anyone explain to me
> what, on the third table, is the lower number used for e.g. 25/135. I
> understand using 25 plus your dive time to get your new group BUT what do
> you use the lower number for???

If it's the PADI tables you are looking at and you are talking about the
table on the back side with the white and blue numbers, the top number in
white is your residual nitrogen time and the lower number is the adjusted
no-decompression limit. There should be a key on the back of the table.


>
> Also how many people still use the dive table? or do you really on your
> computer? I was thinking that even if the table says 50 min at your depth
> it's more important to watch you SPG?? Right or wrong?
>

I mostly use a computer but always keep a set of tables on me as a backup in
case the computer fails.

Jay
http://www.divewithjay.com

> Newbie...
>
>

> There is no such thing as THE third table. It would be useful
> if you mentioned whose table you're using."

I'm using the RDP table from PADI, the third table is on the back... I
managed to get everything figured out last night. THANKS