below what surface interval is considered same dive ?

[Mario]

Hello,

Bellow what surface interval time is considered the same dive and not a new dive?

Is this value same for all different diving schools ?

Thanks,

Mario

[Jammer Six]

In article <***@posting.google.com>, Mario
<***@hotmail.com> wrote:

€ Bellow what surface interval time is considered the same dive and not a new
€ dive?

12 hours.

€ Is this value same for all different diving schools ?

No. There is at least one school that knows how to dive.

You're not certified, are you?

[viz]

€ Bellow what surface interval time is considered the same dive and not a new
€ dive?
12 hours.
€ Is this value same for all different diving schools ?
No. There is at least one school that knows how to dive.
You're not certified, are you?

????

If I go for a double dive with a 2 hour surface interval, you are saying
that is one dive??

/viz

[Jammer Six]

In article <dLJPc.21976$%***@nasal.pacific.net.au>, viz
<***@NOSPAM*.pacific.net.au> wrote:

€ ????

Yup. That's what we thought.

[viz]

€ ????
Yup. That's what we thought.

Sorry - I actually had attributed that post to the wrong poster. I think
you are right - someone here has not done a course, and needs to do one
pronto if they intend diving...

/viz

[mike gray]

€ Bellow what surface interval time is considered the same dive and not a new
€ dive?
12 hours.
€ Is this value same for all different diving schools ?
No. There is at least one school that knows how to dive.
You're not certified, are you?

And you don't know the answer, do you?

[Scott]

Post by mike gray

Post by Jammer Six
€ Bellow what surface interval time is considered the same dive and not a new
€ dive?
12 hours.
€ Is this value same for all different diving schools ?
No. There is at least one school that knows how to dive.
You're not certified, are you?

And you don't know the answer, do you?

5 minutes

[Jammer Six]

In article <***@corp.supernews.com>, Scott
<***@gmail.com> wrote:

€ "mike gray" <***@att.net> wrote in message
€ news:TIMPc.168993$***@bgtnsc05-news.ops.worldnet.att.net...
€ > Jammer Six wrote:
€ >
€ > > In article <***@posting.google.com>, Mario
€ > > <***@hotmail.com> wrote:
€ > >
€ > > € Bellow what surface interval time is considered the same dive and not
€ a new
€ > > € dive?
€ > >
€ > > 12 hours.
€ > >
€ > > € Is this value same for all different diving schools ?
€ > >
€ > > No. There is at least one school that knows how to dive.
€ > >
€ > > You're not certified, are you?
€ >
€ > And you don't know the answer, do you?
€
€ 5 minutes

We're very proud, but we type faster than that. Two minutes.

[Chris]

Post by Jammer Six
No. There is at least one school that knows how to dive.

And many that you do not know about.

[Michael Wolf]

Post by Mario
Hello,
Bellow what surface interval time is considered the same dive and not a new dive?
Is this value same for all different diving schools ?
Thanks,
Mario

May I suggest that you first get certified? You'll notice that the
answers to these and many other basic questions are given during the
course...

[Mario]

If you have the answer, why dont you share it with us please

Post by Michael Wolf

Post by Mario
Hello,
Bellow what surface interval time is considered the same dive and not a new dive?
Is this value same for all different diving schools ?
Thanks,
Mario

May I suggest that you first get certified? You'll notice that the
answers to these and many other basic questions are given during the
course...
--
Michael Wolf
-----
Cthulhu For President.
Why settle for the lesser evil?
remove stopspam to reply

[Michael Wolf]

Post by Mario
If you have the answer, why dont you share it with us please

The others already answered it, but please: follow a course!

Post by Mario

Post by Michael Wolf

Post by Mario
Hello,
Bellow what surface interval time is considered the same dive and not a new dive?
Is this value same for all different diving schools ?
Thanks,
Mario

May I suggest that you first get certified? You'll notice that the
answers to these and many other basic questions are given during the
course...
--
Michael Wolf
-----
Cthulhu For President.
Why settle for the lesser evil?
remove stopspam to reply

[Jammer Six]

In article <410fa5b7$0$1256$***@news.skynet.be>, Michael Wolf
<***@advalvasstopspam.be> wrote:

€ The others already answered it, but please: follow a course!

Let him die.

I'll fill your tanks, no cert card needed.

[mike gray]

Post by Mario
If you have the answer, why dont you share it with us please

The answer is, "it depends".

It is a procedural, not scientific, determination.

If you are using tables, the length of time to drop a letter group is
the answer.

Most computers will start a new dive sequence after an arbitrary surface
interval, usually in excess of five minutes.

If yer a sat diver, ya eat dinner and catch some sleep and yer still on
the same dive.

For me, it's the length of time to change tanks plus eat a banana,
except in winter when I add five minutes of hot shower.

[TonyP]

Post by mike gray

Post by Mario
If you have the answer, why dont you share it with us please

The answer is, "it depends".
It is a procedural, not scientific, determination.
If you are using tables, the length of time to drop a letter group is
the answer.
Most computers will start a new dive sequence after an arbitrary surface
interval, usually in excess of five minutes.
If yer a sat diver, ya eat dinner and catch some sleep and yer still on
the same dive.
For me, it's the length of time to change tanks plus eat a banana,
except in winter when I add five minutes of hot shower.

"Winter"? You mean that it snows in Florida? Wow.... how "cool"....

[Klaus Wolf]

Hello,

Post by Mario
If you have the answer, why dont you share it with us please

There is no unique answer. It depends on how deep you were, how long you
have been diving: The answers is to be calculatend from tables - or by
your diving computer. This you will learn in courses.

Regards
Klaus

[H. Huntzinger]

Post by Mario
Hello,
Bellow what surface interval time is considered the same dive and not a new dive?

On some dive tables, the rule is that if the Surface Interval (SI) is
less than 10 minutes, the "next" dive is accounted as an extension of
the "first" dive instead of as a new dive.

Post by Mario
Is this value same for all different diving schools ?

Probably not.




-hh

[Mario]

This is what I thought, in PADI dive tables is how many minutes?


Thanks,

Mario

Post by H. Huntzinger

Post by Mario
Hello,
Bellow what surface interval time is considered the same dive and not a new dive?

On some dive tables, the rule is that if the Surface Interval (SI) is
less than 10 minutes, the "next" dive is accounted as an extension of
the "first" dive instead of as a new dive.

Post by Mario
Is this value same for all different diving schools ?

Probably not.
-hh

[H. Huntzinger]

Post by Mario
This is what I thought, in PADI dive tables is how many minutes?

I'm not sure...I don't have a current PADI table laying around to check
its instructions.

The main thing is to always "Read the Fine Manual", if for no other
reason than things like this are known to vary.

Another variation, as someone pointed out, was that the definitions of
bottom time also varies between various tables too.

And in the fine print of at least one Table, there's special provisions
on how to add to the bottom time if the ascent rate was too slow. The
Devil's in the details.


-hh

[Buff5200]

The original US Navy Dive tables only tracked tissue loading for the
slowest tissue group
(I think it was 120min group).

The theory is that after 10 minutes of surface interval, the 120 minute
group always had
the highest N2 loading. (fast tissues also off-gas fast).

So if you spent less than 10 minutes on the surface, the shorter tissue
groups might have
higher N2 loading than allowed in the tables. So you treated <10min
surface intervals as
a continuation of the previous dive.

Post by Mario
This is what I thought, in PADI dive tables is how many minutes?
Thanks,
Mario

Post by H. Huntzinger

Post by Mario
Hello,
Bellow what surface interval time is considered the same dive and not a new dive?

On some dive tables, the rule is that if the Surface Interval (SI) is
less than 10 minutes, the "next" dive is accounted as an extension of
the "first" dive instead of as a new dive.

Post by Mario
Is this value same for all different diving schools ?

Probably not.
-hh

[Jerry]

10 minutes

Post by Mario
Bellow what surface interval time is considered the same dive and not a new dive?

[George Cathcart]

10 minutes according to the tables (NAUI and Navy, at least).

5 minutes according to my computer (Suunto Vyper).

YMMV

g

Post by H. Huntzinger
10 minutes

Post by Mario
Bellow what surface interval time is considered the same dive and not a new dive?

[Add AU]

10 mn for a Suunto favor Air
5mn for a Suunto Mosquito.
Maybe Suunto should stick to one timing!!!!

For practical raisons I prefer 10mn.
-Back on the boat to fix my flooding torch =7mn => 2 dives logged,
grrr
-Very shallow dive 1~1.5m, multiple dive logged!!!

5mn for the French table MN 90

On Tue, 03 Aug 2004 09:54:55 -0400, George Cathcart

Post by George Cathcart
10 minutes according to the tables (NAUI and Navy, at least).
5 minutes according to my computer (Suunto Vyper).

For my Email
add .au at the end of
***@comcen.com

[David Walker]

Post by Add AU
10 mn for a Suunto favor Air
5mn for a Suunto Mosquito.
Maybe Suunto should stick to one timing!!!!

But the Favor is about a million years old (well.... maybe I exaggerate a
bit) - you'd expect the algorithms and setup to have changed in all that
time, especially given the nature of decompression theory (ie it is just a
theory, not exact numbers).

Post by Add AU
For practical raisons I prefer 10mn.
-Back on the boat to fix my flooding torch =7mn => 2 dives logged,
grrr

Just ignore the first - no problem.

Post by Add AU
-Very shallow dive 1~1.5m, multiple dive logged!!!

1m is barely a puddle... I'm not a fan of snorkels, but that would certainly
be one time to snorkel rather than dive.

David

[Add AU]

Post by David Walker
But the Favor is about a million years old

I agree

Post by David Walker

Post by Add AU
-Back on the boat to fix my flooding torch =7mn => 2 dives logged,

Just ignore the first - no problem.

Not a real problem, just annoying to have 2 dives in your computer.

Post by David Walker

Post by Add AU
-Very shallow dive 1~1.5m, multiple dive logged!!!

1m is barely a puddle... I'm not a fan of snorkels, but that would certainly
be one time to snorkel rather than dive.

I agree, but it was a night dive from the shore in Mabul (Supadan).
I did not thing I will find so many thing.
Also I do not snorkel (free dive) during a diving trip.
Alain


For my Email
add .au at the end of
***@comcen.com

[TerryH]

Post by Mario
Hello,
Bellow what surface interval time is considered the same dive and not a new dive?
Is this value same for all different diving schools ?
Thanks,
Mario

Basicly whatever is deemed safe at the time.

If you were doing an Open Water course and you had been
at 6m for 45min, then 10mins changing cylinders and off you go again.

If however you were on a course that had a proper dive, say 20m
at least, then there would have to be a decent surface interval prior to
you doing another 20m dive.

What is frowned upon is not getting out. In other words surfacing
and then going back again even if it is only 6 mts. Part of any
basic course is the repetition of kitting up, doing buddy checks etc.
Basic familiarisation with kit is very important.

I've had to re-teach many a diver who skipped or more lilkey
was told to skip, this bit on there basic course.

TerryH

[Lee Bell]

Post by Mario
Hello,
Bellow what surface interval time is considered the same dive and not a new dive?
Is this value same for all different diving schools ?

It's not an easy question to answer. If you're on most tables, your dive
time stops when your direct ascent begins. Once you've reached the surface,
you really can't count anything as the same dive, even though you may be in
the same repetitive dive group. For dive computers, it depends on the
computer. I think mine considers a dive done after 10 minutes. The time
probably varies from one manufacturer to another.

The best answer I can come up with is "it doesn't matter." You plan the
dive or dives according to the tools of your choice, be that tables,
computer or custom tables developed by a computer program run on the surface
and do them according to your plan . . . or according to what you're
computer thinks is OK.

Lee

[Cpt. Dale Bennett]

If you're on most tables, your dive

Post by Lee Bell
time stops when your direct ascent begins. Once you've reached the surface,
you really can't count anything as the same dive, even though you may be in
the same repetitive dive group.

Not correct. When using tables, your bottom time stops when your ascent
begins but your surface interval does not start until you reach the surface.
It is a bit different with a computer. Each is a little different, but you
should not confuse the procedures used with tables with protocols developed
for computers.

[Jason]

Post by Cpt. Dale Bennett
Not correct. When using tables, your bottom time stops when your ascent
begins but your surface interval does not start until you reach the surface.

Of course, some tables use dive time and not bottom time.

Jason

[Cpt. Dale Bennett]

Post by Jason
Of course, some tables use dive time and not bottom time.
Jason

All the computers that I am familiar with use dive time in their logging
feature. Depth pressure is integrated over time in a way that is just not
possible with tables. Usually, if the computer measures less than 3 to 5
fsw for more than about 5 minutes it resets to a new dive. If pressure is
restored within this time (the diver descends) the computer continues to
consider the exposure a single dive. However, with a computer this does not
usually change the way the algorithm calculates the exposure. The only real
difference is in how it logs the dive(s).

Safe diving,

Dale Bennett
Captain Dale's, Inc.
Enterprise Marine, Inc., Dive Charters

[Jammer Six]

In article <oH9Qc.87873$***@attbi_s51>, Cpt. Dale Bennett
<***@comcast.net> wrote:

€ "Jason" <***@ntlworld.com> wrote in message
€ news:***@ntlworld.com...
€ > Of course, some tables use dive time and not bottom time.
€ > Jason
€
€ All the computers that I am familiar with use dive time in their logging
€ feature. Depth pressure is integrated over time in a way that is just not
€ possible with tables. Usually, if the computer measures less than 3 to 5
€ fsw for more than about 5 minutes it resets to a new dive. If pressure is
€ restored within this time (the diver descends) the computer continues to
€ consider the exposure a single dive. However, with a computer this does not
€ usually change the way the algorithm calculates the exposure. The only real
€ difference is in how it logs the dive(s).
€
€ Safe diving,
€
€ Dale Bennett
€ Captain Dale's, Inc.
€ Enterprise Marine, Inc., Dive Charters

Read it again, "captain".

[Cpt. Dale Bennett]

Post by Jammer Six
Read it again, "captain".

You're right. I read the post a bit too quickly. I am not familiar with
every table out there, but those that I have seen all used bottom time (time
from start of descent to start of ascent). I suppose there could be some
that use run time but that would be a bit complicated since that includes
decompression time. Usually one wants to start with bottom time first and
then calculate deco and run time. Starting out with total run time seems a
little backwards to me.

Safe diving,

Dale Bennett
Captain Dale's, Inc.
Enterprise Marine, Inc., Dive Charters

[Jason]

Post by Cpt. Dale Bennett
You're right. I read the post a bit too quickly. I am not familiar with
every table out there, but those that I have seen all used bottom time (time
from start of descent to start of ascent). I suppose there could be some

BSAC 88s use dive time, where I believe that dive time is defined as the
time from descent until your first stop.

As for computers, well they track your N2 (or He) saturation over a number
of compartments in real time based on your current depth. So if you surface
even momentarily, your deco status will be different compared with if you
didn't. The number of dives you've made is irrelevant. It's only the
depths and times you've been at them that count. (and the gases your
breath).

Jason

[Pete Melbourne]

On Wed, 04 Aug 2004 23:57:30 +0100, Jason

Post by Jason
BSAC 88s use dive time, where I believe that dive time is defined as the
time from descent until your first stop.

Correct

--
Pete

news 'at' melbourne 'dot' me 'dot' uk

[H. Huntzinger]

Post by Cpt. Dale Bennett

Post by Jammer Six
Read it again, "captain".

You're right. I read the post a bit too quickly. I am not familiar with
every table out there, but those that I have seen all used bottom time (time
from start of descent to start of ascent).

Its not just the definitions, but also the Table's fine print.

For example, the traditional USN dive table has a "miscellaneous" type
of note in its fine print that many people either never learned about.

Specifically, it states that if the diver's ascent is delayed (including
simply being slower than the table's 60ft/min rate), the additional
amount of time that it took to get up to shallower than 50fsw is added
to the diver's bottom time.


A simple illustration of this is a dive to 110fsw: at a 60ft/min ascent
rate, the diver's ascent should get him up to 50fsw in 1 minute. If he
ascends more slowly, it takes longer and this extra time as per the USN
table is added to the bottom time: a 30ft/min ascent rate would take
him 2 minutes, so this is a +1 minute bottom time "penalty". Etc.



-hh

[Rich Lockyer]

Post by Mario
Bellow what surface interval time is considered the same dive and not a new dive?
Is this value same for all different diving schools ?

5 minutes.



--- Rich
http://richlockyer.tripod.com/