Timex Navi Depth - Dial function?

# Thread: Timex Navi Depth - Dial function?

1. ## Timex Navi Depth - Dial function?

So I've been googling and searching this forum for any info about the additional set of numbers on this Timex "Navi Depth" dial.
Given the name of the watch I figure they have to be dive / decompression related, so I thought this would be the place to ask.
Anyone know what the inner 3-15 numbers are for and how, theoretically they would be used?
Not really a dive watch anyway at 100m, but still I'm curious.

2. ## Re: Timex Navi Depth - Dial function?

A lot of "lookies" and no replies. Is there another hand hidden? Perhaps some sort of depth gauge however, the numbers are all linear... strange!

3. ## Re: Timex Navi Depth - Dial function?

Nope, no hidden hands. Just counting up by 1.5s around the dial. But 1.5 what????

4.

5. ## Re: Timex Navi Depth - Dial function?

I'll caveat this by saying I could be completely wrong.

There are similar numbers on the Seiko "Arnie" watch (the original, not the new one). I read a long time ago that they do have something to do with ascent from depth: Basically, with the bezel at 12 o'clock, it will take you the number of seconds as indicated on the dial that corresponds to the number on the depth meter (in meters) to ascend to the surface. For example, if you're at 13 meters it will take you 45 seconds to ascend to the surface.

I Googled it and I found this on the article posted at Fratello Watches.

https://www.fratellowatches.com/tbt-...-diver-review/

6. ## Re: Timex Navi Depth - Dial function?

The rate is correct, at least up to 10 meters, at (about) three seconds a meter. Below 10 meters, you can ascend at twice that rate. A couple of gripes, beyond Fratello's statement "...a poor man’s “no deco” bezel..." is that from about 34 seconds on, they could have packed the numbers twice as tight, allowing for a depth greater than 15 meters. It's not often that a dive is less than 15 meters. But more important, if you are relying on a watch for this function you clearly didn't bring a computer and then the bezel serves a much more important purpose of actually timing your dive. That requires moving the bezel which blows the function of the rate indicator.

I can see me trying to control my ascent by holding up the depth gauge and the watch at the same time. Better yet, if we set the wayback machine that far back, the depth gauge is a capillary tube and I'm trying to spot the meniscus (yes, I did have one back in the day). When I tell kids today what primitive stuff we dove with back then, they can't believe it.

But good find Toonces. Woulda caused me grief trying to boggle it.

7. ## Re: Timex Navi Depth - Dial function?

Even going old skool, it's hard for me to envision a scenario where I'd be using my watch to time my ascent. I suppose once you've noted your bottom time you could reset the bezel before your ascent to use the gauge. I have to think that watching your bubbles is easier ...

I only knew of it because a few months ago I was seriously hunting for a vintage Seiko Arnie and I did a search for the depth gauge on it. I initially thought it was an actual depth gauge, and I couldn't figure out how it worked.

8. ## Re: Timex Navi Depth - Dial function?

The only time I've seen those numbers is on the old Seiko Arnie as well.

9. Thanks all, figured it had to be something of that nature

10. ## Re: Timex Navi Depth - Dial function?

The more I look at that Timex the more attractive it becomes. Cool watch and lore that followed.

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