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Question for the diving experts.

PostPosted: January 12th 2018, 9:09am
by foghorn
After nearly a year of ownership I just noticed that , on the bezel of my Zodiac SeaWolf reissue, there are triangles instead of lines at the 3,6 and 12 minute marks.



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I know that on vintage style chronos this is done on the minute subdial (one theory is for timing pay phone calls) but I'm wondering what the significance it is on a dive watch bezel. I know it's a vintage holdover but I want to know why. I got bored looking on line so I figured I'd reach out here to our many intelligent afficionados of such minutiae.

Re: Question for the diving experts.

PostPosted: January 12th 2018, 10:01am
by relaxer7
Extra warning for when you're oxygen is reeeaaallly gonna run out and you're about to turn blue and float up to the surface of your bath? :lol:

Re: Question for the diving experts.

PostPosted: January 12th 2018, 10:25am
by bobbee
Beware of spudsharks! (Like relaxer7's Bananacuda!)



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Re: Question for the diving experts.

PostPosted: January 12th 2018, 10:26am
by Racer-X
“The markers for 3, 6, 9 and (especially) 12 o'clock on the watch face and the zero marker on the bezel of analogue diver's watches are usually conspicuously styled to prevent disorientation induced read out errors.“

https://en.wikipedia.org/wiki/Diving_watch#Legibility

Re: Question for the diving experts.

PostPosted: January 12th 2018, 11:22am
by iwasbanned
Irrelavent, that watch is not ISO certified and as such would kill you during a dive.

Re: Question for the diving experts.

PostPosted: January 12th 2018, 11:41am
by foghorn
Racer-X wrote:“The markers for 3, 6, 9 and (especially) 12 o'clock on the watch face and the zero marker on the bezel of analogue diver's watches are usually conspicuously styled to prevent disorientation induced read out errors.“

https://en.wikipedia.org/wiki/Diving_watch#Legibility






But my question is the different marks a the 3,6,12 minute marks.

Re: Question for the diving experts.

PostPosted: January 12th 2018, 11:48am
by Wasp
Zodiac has used that convention for quite some time. Although I can't find quick and dirty proof I have a feeling it has to do with primitive dive tables. Decompression stops were not broken down to the specificity that they are today. Just general hang times for most dive profiles. Hang: 30ft 6min 20ft 3min 10ft 3min. < could be reversed I can't clearly recall that table from the 50's.

Re: Question for the diving experts.

PostPosted: January 12th 2018, 1:10pm
by Racer-X
foghorn wrote:
Racer-X wrote:“The markers for 3, 6, 9 and (especially) 12 o'clock on the watch face and the zero marker on the bezel of analogue diver's watches are usually conspicuously styled to prevent disorientation induced read out errors.“

https://en.wikipedia.org/wiki/Diving_watch#Legibility


But my question is the different marks a the 3,6,12 minute marks.


Yep, I did not read that right, and will shut my trap until Carl shows up with the real answer.