Do you wear a dive watch? (not computer)

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@Nemrod

How do you use the NDL calculator on this watch?

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@Nemrod

How do you use the NDL calculator on this watch?

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It is not really a calculator, it is the old Navy Tables, 60 minutes at 60 feet, 30 minutes at 90 feet, 25 minutes at 100 feet and 10 minutes at 130 feet and so on, for example, you just read across.
 
I am a dive watch collector and yes, I usually dive with a mechanical dive watch, except with drysuit. I own probably 50 dive watches in my collection from Citizen (excellent dive watches) to Rolex, going thru Omega, Seiko, Sinn...
The watch of my avatar is a Seiko SD 600m.
Is it useful underwater ? Humm, not really, except to have the time to get out of the water for "apéritif", very important moment !
 
My current watch is a Tag Huer, that I've had since 1991, a gift to myself after surviving Gulf War 1, and its been on more than 2,000 dives

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