5 bar, 10 bar, 20 bar, 200m huh? - Seiko & Citizen Watch Forum Japanese Watch Reviews, Discussion & Trading
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Old 10-28-2016, 01:22 AM   #1 (permalink)
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Default 5 bar, 10 bar, 20 bar, 200m huh?

So just digging around looking at atmospheres, bar, meters, etc. the depth guidance for some watches seems pretty vague. 50 meter watches can/should withstand the pressures of 50 meters under water for a certain time (swimming and diving produce more pressure I know) so in perfect conditions just going to 50 meters of pressure is OK. But, what is with the 20 bar rating? 20 bar is suppose to be the equivalent of 200 meters is about 656 feet. So the watch should last a short period at the pressure of 200m (stationary in perfect conditions).
Seiko has in the manual 20bar is good for shallow diving but not SCUBA diving.
I grew up diving in Florida and shallow diving to us was about 30-35 feet. Deep was 100-150 or so.
What is Seiko's definition of shallow diving?
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Old 10-28-2016, 03:47 AM   #2 (permalink)
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Here's my guide. Obviously very subjective and with lots of overlap.
Btw, I take my 300m Tuna off when bathing the kids

50 - washing the dishes and taking a shower, maybe splashing in the pool.
100m - swimming, snorkelling
150 - skin diving, shallow air diving
200m+ - real diving



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Old 10-28-2016, 07:51 AM   #3 (permalink)
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Originally Posted by tritto View Post
Here's my guide. Obviously very subjective and with lots of overlap.
Btw, I take my 300m Tuna off when bathing the kids

50 - washing the dishes and taking a shower, maybe splashing in the pool.
100m - swimming, snorkelling
150 - skin diving, shallow air diving
200m+ - real diving



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I would even be a bit more conservative myself. Better be safe than sorry.

50- ocasional splashes/rain
100- dishes/shower
200- swimming/snorkeling
200+ real diving

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Old 10-28-2016, 08:29 AM   #4 (permalink)
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So my thought process, my 7S26-0029 AO is a diver's 200m and I have my Landmaster on the way that is 20 bar rated. They should be the same when it comes down to water resistance, correct? At least all logic would dictate it to be so.

BTW, anyone that snorkels in depths in excess of 100m.. is a bad ass...
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Old 10-28-2016, 08:42 AM   #5 (permalink)
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Originally Posted by David in Germany View Post
So my thought process, my 7S26-0029 AO is a diver's 200m and I have my Landmaster on the way that is 20 bar rated. They should be the same when it comes down to water resistance, correct? At least all logic would dictate it to be so.

BTW, anyone that snorkels in depths in excess of 100m.. is a bad ass...
Correct on the water resistance of both your watches, and the badass!
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Old 10-28-2016, 08:38 PM   #6 (permalink)
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The Landmaster ist a master of the LAND, the SKX should be more suited to diving

I don't know if they make differences in construction, but my take is that 20bar/200m WR watches are made to withstand the rating test, whereas the diver's watches that are ISO certified are made to really dive (if that makes sense).
Seiko did a deep dive video with the Tunas and they had quite a bit of safety margin on their rating...

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Old 10-29-2016, 05:45 AM   #7 (permalink)
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I think in the long run, any of mine would be fine for my diving depths of under 150ft. This includes the Landmaster, my 200m divers or even my 100m Quartz.
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