What are quadrant compression calculation on dive watch Dial?

[HK Shooter]

I saw these markings on a GIRARD PERREGAUX diving watch "with quadrant compression calculation areas" on the dial. 52/2 37/6 27/7 and 18/2. Any one know what they mean and how a diver is supposed to use them? They are also on the Zodiac Super Sea Wolf.

http://www.watchestobuy.com/images/GirardDives.JPG http://www.dapbt.org/zebay1.jpeg

[yamahaki]

theres a diive table that came with the zodiac. I don't have the original one though. I know steve had one. my our resident diver knows those tables?

[subkrawler]

theres a diive table that came with the zodiac. I don't have the original one though. I know steve had one. my our resident diver knows those tables?

I've been trying to figure it out for the past day, and I don't have a clue. I'll try to find out though.

[J.Bond]

http://www.dapbt.org/zebay1.jpeg

I cannot answer your question because I do not know the answer. But I love your Zodiac SSW. :-p:-p:-p:-p:-p:-p:-p:-p

~JB

[HK Shooter]

Come on... Someone has to know this! o|

[HalifaxNS]

I just asked my father, he works in dive saftey, very short list of Canadians with more experience than him. He has writen many manuals.

I sent him a pic of the watch, he said the numbers dont look familiar at all. I told him they call it a 'quadrant compression calculation area".
He said "I noticed that the numbers were in four quadrants of the dial, but how they relate to compression is a mystery to me".
I would think in order for the numbers to be usefull to a diver, they should know what it is off the bat.

maybe this is a question for someone at Zodiac.

[subkrawler]

I just asked my father, he works in dive saftey, very short list of Canadians with more experience than him. He has writen many manuals.

I sent him a pic of the watch, he said the numbers dont look familiar at all. I told him they call it a 'quadrant compression calculation area".
He said "I noticed that the numbers were in four quadrants of the dial, but how they relate to compression is a mystery to me".
I would think in order for the numbers to be usefull to a diver, they should know what it is off the bat.

maybe this is a question for someone at Zodiac.


I thought about asking Zodiac, but since they've been bought by Fossil, I doubt the question would get very far. Maybe someone should ask GP. I would, but I'm travelling and on the forum via my iPhone, so I can't attach pics.

[HalifaxNS]

who do you mean by GP?

[DMB]

who do you mean by GP?

GIRARD PERREGAUX .... see OP. - David

[NMehring]

Heres a stab at it. Since these watches were designed for commercial use..I.E. saturation diving. maybe these calculation zones were not to be used under water but after you were topside , to calculate time needed to be spent in a decompression chamber to equalize??? like by time spent your compression would equal a certain amount of time in the chamber , which could be divided into 4 quadrants like a graph and give a rough estimate, or like dive tables work , round up your time spent up to the nearest 10 to be safe? lol ill have to ask my girlfriends dad he might know

[HK Shooter]

I sent an email to Roger Rugger, but have not heard from him. Maybe I try GP. Now I want to know. I don't even have one of these watches, but I like to solve a good mistery all the time. :think:

[poulbrix]

I sent an email to Roger Rugger, but have not heard from him. Maybe I try GP. Now I want to know. I don't even have one of these watches, but I like to solve a good mistery all the time. :think:

Butch from Vintage Zodiacs just emailed me the time table for the Zodiac SSW that is used in conjuction with the numbers on the dial. He said it is used for timing dives.

[Chris }<////(°>]

Butch from Vintage Zodiacs just emailed me the time table for the Zodiac SSW that is used in conjuction with the numbers on the dial. He said it is used for timing dives.

Hmmm. I am a diver & it doesn't make much sense to me.
Mind you I haven't looked at a set of tables for years. I am wondering if GP & Zodiac figures are in metres not feet & taken from non-recreational tables at that. :-s
I will try and find my metric dive tables & see if there is any corelation.

Pip pip

[subkrawler]

Hmmm. I am a diver & it doesn't make much sense to me.
Mind you I haven't looked at a set of tables for years. I am wondering if GP & Zodiac figures are in metres not feet & taken from non-recreational tables at that. :-s
I will try and find my metric dive tables & see if there is any corelation.

Pip pip

I get the tables. They're in Imperial, not metric and are fairly conservative, so they're recreational mostly.

I'm fairly close to figuring it out, but I'm tired and brain fried, so it may be until tomorow before I get it completely.

Poul, I like Butch's answer..."used for timing dives". No $h!t:-d:-d Can you ask him to go into more detail?

Also, where is "deepcdvr" when we need him? That's all those Navy guys do is run tables.;-)

[HK Shooter]

I can see how you use the table for diving and the watch to figure out how long you have been diving.... but how do you use these funny fractions on the dial???? :think:

[Chris }<////(°>]

I get the tables. They're in Imperial, not metric and are fairly conservative, so they're recreational mostly.

I'm fairly close to figuring it out, but I'm tired and brain fried, so it may be until tomorow before I get it completely.

Poul, I like Butch's answer..."used for timing dives". No $h!t:-d:-d Can you ask him to go into more detail?

Also, where is "deepcdvr" when we need him? That's all those Navy guys do is run tables.;-)

I meant the quadrant numbers on the watches might be metric not the printed table :-! I have tried putting the bezel on the hour hand & minute hand but it is no help. There must be a particular table associated with these watches:think:

They don't seem to tie in with my (recreational) metric tables either. Do
let us know if you figure it out

Pip pip

[ElChingon7]

I have googled the hell out this, and came up empty...o|

Need to know now.

[HK Shooter]

I heard back from GIRARD-PERREGAUX :


Many thanks for your message and your interest in our Brand.

Your question is very interesting. We try to find a decent reply but for the moment nobody in the house has an idea how to use these indications. We found they could be "decompression ratios" but nothing more. We are trying to find more details and we won't miss to come back to you later.

Sorry not being able to help you immediately. This watch is rather old and our records don't give us much information. By the way is there any reference number engraved at the back of the watch ? This information might help.

Waiting on your reply, we remain,

Yours sincerely,


GIRARD-PERREGAUX SA
Dpt. Communication
Jacqueline PERRINJAQUET



Let's not give up on this. I need to know ;-) I send her some more info on the watch. The GP is called a: 1970's Girard-Perregaux 200 Meter Professional Deep sea Divers Gyromatic by the way.

[Patstarrx]

I'm not a diver but I came up empty in my surfing as well... Good Luck!

[HK Shooter]

And this is what I got back from Zodiac :roll:


Dear Andreas,
After talking to a couple of different departments here, we have found that the numbers are ratios for times. Unfortunately, I do not have a specific table for this watch. However, I do know that the ratios are based on the amount of time you have to return to the surface, based on your oxygen level. Also, the ratios are based on recreational diving, so they may not be as accurate as professional diving watches. I'm sorry that I can't be of more help.


Thanks for writing,

Zodiac Customer Service
customerservice@zodiacwatches.com
http://www.zodiacwatches.com/
800.699.0569

[subkrawler]

And this is what I got back from Zodiac :roll:

Very cool HK, but I'm not so sure about Zodiac's answer..."based on your oxygen level"? I doubt very seriously the numbers relate to PPO2.:-s:roll:

Anyway, I haven't cracked it yet. The best I can figure is that the larger numbers(52, 37, 27, 18) are figures for a specific botom time. The smaller numbers(2,6,7,2) are decompression times for the afore mentioned bottom times. What I can't figure out, are at what depth do these figures apply. Also, I'm wondering if the placement of the numbers on the dial are really relevant, or are they just convenient places to place them.:think:

I'm not giving up though. If we keep at it, I know we can figure it out.

[ElChingon7]

Still nothing from that master diver...'deepcdvr ' ???

I even looked at that page he posted a while back where the new Navy Dive manual was posted, and still nothing in all those PDFs on the site. Talk about A LOT of info. Whew, I'm dizzy...

[Nalu]

I'm a USN-trained diver and chamber operator. I have most of the equivalent civilian certifications also. I've never been able to make sense of these numbers.

I also emailed Zodiac a few years ago, got an answer back saying "we're checking around" and nothing after that o|

This question comes up periodically on the watch forums and I've never seen an answer that makes any sense. It remains a complete mystery to me :think:

[leadweight]

The sequence 52, 37, 27, 18 could be the no stop times for 60, 70, 80, and 90 feet on somebody's tables (or even 70, 80, 90 and 100 feet), but none of the several that I own. The other numbers and positioning on the dial leave me clueless. do those numbers fit anywhere on the tables pictured above?

Let it suffice that I will be using something else to plan my next dive.

[HalifaxNS]

The sequence 52, 37, 27, 18 could be the no stop times for 60, 70, 80, and 90 feet on somebody's tables (or even 70, 80, 90 and 100 feet), but none of the several that I own. The other numbers and positioning on the dial leave me clueless. do those numbers fit anywhere on the tables pictured above?

Let it suffice that I will be using something else to plan my next dive.

I think we should all tell Zodiac to get rid of this stupid idea.

Look at all the experienced divers not having a clue on how to use these numbers. I said it befor, but in order for a diver to find this usefull he should know what it is right away!

Is anyone behind the wheel at Zodiac? they asked all the departments and still couldnt come up with a decent answer,,,,,,,,its their watch!!

[Chris }<////(°>]

I think we should all tell Zodiac to get rid of this stupid idea.

Look at all the experienced divers not having a clue on how to use these numbers. I said it befor, but in order for a diver to find this usefull he should know what it is right away!

Is anyone behind the wheel at Zodiac? they asked all the departments and still couldnt come up with a decent answer,,,,,,,,its their watch!!

The only additional info I could find is that the Zodiac SSW came with a "wallet sized set of waterproof dive-tables" I guess we need to find a set to see if it explains the quadrant markings.

Pip pip

[HK Shooter]

GIRARD-PERREGAUX came through with the user manual for the GP dive watch:

The reference number of the watch is 9108. The movement called Gyromatic (see attachment) GP 42-0 is a calibre 11 ½''' automatic high-frequency, 36,000 vibrations/hour. The watch is dated between 1967 and the early 70's. Nice watch, I saw one on ebay for $2000 by the way.

Anyway, here is the answer to to how to use the "fractions" on the dial :-!

http://wiersbitzky.com/Documents/GP%20table%202.JPG
http://wiersbitzky.com/Documents/GP%20table%203.JPG
http://wiersbitzky.com/Documents/GP%20table%204.JPG

[poulbrix]

GIRARD-PERREGAUX came through with the user manual for the GP dive watch:

The reference number of the watch is 9108. The movement called Gyromatic (see attachment) GP 42-0 is a calibre 11 ½''' automatic high-frequency, 36,000 vibrations/hour. The watch is dated between 1967 and the early 70's. Nice watch, I saw one on ebay for $2000 by the way.

Anyway, here is the answer to to how to use the "fractions" on the dial :-!

http://wiersbitzky.com/Documents/GP%20table%202.JPG
http://wiersbitzky.com/Documents/GP%20table%203.JPG
http://wiersbitzky.com/Documents/GP%20table%204.JPG


Great job :-!

Mystery finally solved. Now go get that Zodiac SSW ;-)

[suddha]

I'll need to re-read this a few times after a couple cups of coffee, and I only do no deco diving... But gawd, I love this forum. Thank you, HK Shooter!

[HK Shooter]

I'll need to re-read this a few times after a couple cups of coffee, and I only do no deco diving... But gawd, I love this forum. Thank you, HK Shooter!

Concidering that I don't even have any of these watches I did spend too much time looking for the answer. But I always love a good mystery b-).

Now if I only could find one of these actual divers...:roll:

[yamahaki]

thanks to hk shooter, the mystery has been solved. so this gets a stickie.
hk shooter is the man!

[HalifaxNS]

Thanks HK shooter, great find.

now I just need suddha to finish his coffee,,,,,,,,,,,,,so I can make a couple cups to get to the bottom of his explanation

little over my head.


I'll need to re-read this a few times after a couple cups of coffee, and I only do no deco diving... But gawd, I love this forum. Thank you, HK Shooter!

[subkrawler]

HK,

That is awesome! I had a good feeling that GP would come through.:-! It also further backs-up what I had to say in this thread, just in case anybody didn't think I knew what I was talking about.;-)
http://forums.watchuseek.com/showthread.php?t=146915&highlight=minute+scale

It's funny how once you know the answer to something, you're like "damn, how could I have not seen that". The biggest thing that threw me, was the depth being in metric. Chris did get that part correct, so between all of us, we sort of had the answer the whole time.

For you guys having trouble wrapping your brain around the info, maybe I can walk us through, to make it clearer.

OK let's make the dive. First, you're using the bezel as a count-down bezel. This means you set the bezel arrow at where you want to end the dive, not at the beginning. Let's use the first quadrant figure(52/2) which lies between the "5-10" minute indices on the dial, to make our example dive. The "52" is our dive depth in meters and the "5-10" is our bottom time at that depth. Knowing our 5-10 minute bottom time we set our bezel 5-10 minutes ahead of the minute hand(remember we're counting down).

We now jump in and make our dive to 52 meters. At the end of our 5-10 minute dive time, we should be back at 3 meters(predetermined as per the GP instructions), when the minute hand aligns itself with the arrow on the bezel. Now is where the "2" from our fraction comes into play, that's our mandatory decompression time. Now you have your "15 minute" scale on the bezel to help you time your 2 minutes of decompression. Once the 2 minutes elapse, decompression is complete and you safely ascend to the surface.

Same thing goes for the second figure on the dial(37/6). Dive to 37 meters for 20-25 minutes, and you have a decompression of 6 minutes. At the end of the dive you use the 15 minute scale to time the 6 minutes of decompression.

Easy, right?b-)

[Fatpants]

Great work Andreas:-!

[HalifaxNS]

:thanks thanks subkrawler, great explanation.

your link was helpfull too |> |>

[Chris }<////(°>]

HK,

That is awesome! I had a good feeling that GP would come through.

Snip

We now jump in and make our dive to 52 meters. At the end of our 5-10 minute dive time, we should be back at 10 meters(predetermined as per the GP instructions),
Snip

I think you mean "back at 3 metres (10 ft.) predetermined as per the GP instructions" :-!

Interestingly it does kind-of-imply that you can pop "like a cork" up to 3 metres after 10 minutes at 52 metres. That'll get your micro-bubbles frisky!
My dive-computer would be throwing a blue fit!

They was tough in them days. :think:

Pip pip

[subkrawler]

I think you mean "back at 3 metres (10 ft.) predetermined as per the GP instructions" :-!

Interestingly it does kind-of-imply that you can pop "like a cork" up to 3 metres after 10 minutes at 52 metres. That'll get your micro-bubbles frisky!
My dive-computer would be throwing a blue fit!

They was tough in them days. :think:

Pip pip

You're right, I meant "3 meters". Just can't keep the "Imperial" from coming out in me.:-d

[Chris }<////(°>]

HK,


We now jump in and make our dive to 52 meters. At the end of our 5-10 minute dive time, we should be back at 3 meters(predetermined as per the GP instructions), when the minute hand aligns itself with the arrow on the bezel. Now is where the "2" from our fraction comes into play, that's our mandatory decompression time. Now you have your "15 minute" scale on the bezel to help you time your 2 minutes of decompression. Once the 2 minutes elapse, decompression is complete and you safely ascend to the surface.


Easy, right?b-)

Just for fun I have run that profile as a "diveplan" on my dive computer, an Aladin Air-Z. It gives a 10 minute deco. time after 10 minutes at 52m. The Aladin is not known to be one of the most conservative dive computers either!

Like I said, tough guys those GP divers!:-x

[cflye]

HK, you are my hero. Great detective work and persistance. Now, if only I hadn't sold all of my SSWs!

[ripper]

Thanks for this information!

[Frogger]

Just for fun I have run that profile as a "diveplan" on my dive computer, an Aladin Air-Z. It gives a 10 minute deco. time after 10 minutes at 52m. The Aladin is not known to be one of the most conservative dive computers either!

Like I said, tough guys those GP divers!:-x
(-as opposed to 2minutes suggested by the watch)

Yeah that was what struck me first when i saw thess figures-the times are far too short. But I think that you have to add all those figures together- in contrast to what the manual says. That would not only be a bettter advise, it would also be nearer the suggested times.
Anyhow I ALWAYS do a deco stop at 3meters for 5 minutes, even when I dont need it. Safety first.