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Thrasher · 21 August 2009, 09:59 AM

Why does the Submariner bezel (and most dive watches, ftm) have the first 15 minutes displayed as minutes, and then change to 5 minute increments?

taxico · 21 August 2009, 10:28 AM

maybe it's just more practical for timing things without cluttering up the bezel... (i think)

deserted · 21 August 2009, 10:30 AM

I don't dive that deep , i wish i knew the answer!

dhiltonlittle · 21 August 2009, 10:43 AM

if you turn the bezel and set it to the minute hand it will count down a fifteen minute dive. i'm sure some actual divers can fill us in on the real details!

Rikki · 21 August 2009, 12:39 PM

The Rotating bezel on a sub is mono directional for the reason that if you are using it to calculate your dive time it will only shorten your dive duration giving you a safe dive. If it didn't you could bump it change the time of your dive and get in trouble with your dive tables and possbly get bent or the benz. To set it put the triangle on the minute hand and it will count your time of the dive to whatever predetermined time you need for your dive. Say you're diving to 80 feet you don't want to exceed 25 minutes before you start heading for the surface ,so when the minute hand is pointing at 25 on your bezel time to go up.That should do it . Rik the watchmaker

jon84gt · 21 August 2009, 12:58 PM

Exactly Rik! The bends are a bad thing!!!! I would rather be horse whipped!

snow_rocks · 22 August 2009, 08:06 AM

The minute markers used in the 15 minute range on the bezel is something Rolex has used since the '50s, and has been copied by other watch makers.

Dive times were based on Navy dive tables at the time. The ascent can be timed with the minute markers, especially if stops are necessary for de-comp dives.

Now, it is not necessary for this unique feature of the bezel for todays diving.

SDDS · 22 August 2009, 08:40 AM

this technique has been used for a long timeshowing the 15 minutes display..when they first introduced the model

Blue Lantern · 23 August 2009, 07:14 AM

I was just reading about this on a Wikipedia page, under "Bezel markings":

http://en.wikipedia.org/wiki/Diving_watch

The explanation on the Wikipedia entry is based on a thread from the Watchuseek forums.

21 August 2009, 09:59 AM	#1
Thrasher Member Join Date: Jul 2009 Real Name: Rich Location: New York Watch: 16710 Coke Posts: 275	Submariner bezel Why does the Submariner bezel (and most dive watches, ftm) have the first 15 minutes displayed as minutes, and then change to 5 minute increments?

21 August 2009, 12:58 PM	#6
jon84gt "TRF" Member Join Date: Feb 2009 Real Name: Jon Location: Chattanooga Tn. Watch: Gmt master II Posts: 172	Exactly Rik! The bends are a bad thing!!!! I would rather be horse whipped! __________________ Gmt master 16710 Omega 3570.50 "Moon Watch" Tudor Sub NAWCC member

22 August 2009, 08:40 AM	#8
SDDS "TRF" Member Join Date: Apr 2009 Real Name: Yazan Location: Canada Posts: 4,782	this technique has been used for a long timeshowing the 15 minutes display..when they first introduced the model __________________ Patek Philippe 5167 Patek Philippe 5905P black dial Rolex Deepsea 116660 M series Rolex Oysterquartz 17000 N series Rolex OP 41MM 124300 Green Dial

21 August 2009, 10:28 AM	#2
taxico "TRF" Member Join Date: Jul 2007 Location: Asia / USA Watch: on my wrist! Posts: 113	maybe it's just more practical for timing things without cluttering up the bezel... (i think)

21 August 2009, 10:30 AM	#3
deserted Banned Join Date: Jul 2009 Location: fort wayne IN Watch: Patek 1909003 Posts: 2,176	I don't dive that deep , i wish i knew the answer!

21 August 2009, 10:43 AM	#4
dhiltonlittle "TRF" Member Join Date: Jun 2009 Real Name: David Location: NYC Watch: Rolex SS Sub Date Posts: 181	if you turn the bezel and set it to the minute hand it will count down a fifteen minute dive. i'm sure some actual divers can fill us in on the real details!

21 August 2009, 12:39 PM	#5
Rikki TechXpert Join Date: Jun 2009 Real Name: Rik Dietel Location: Seminole Fla Watch: 5512 s/s Sub Posts: 1,818	The Rotating bezel on a sub is mono directional for the reason that if you are using it to calculate your dive time it will only shorten your dive duration giving you a safe dive. If it didn't you could bump it change the time of your dive and get in trouble with your dive tables and possbly get bent or the benz. To set it put the triangle on the minute hand and it will count your time of the dive to whatever predetermined time you need for your dive. Say you're diving to 80 feet you don't want to exceed 25 minutes before you start heading for the surface ,so when the minute hand is pointing at 25 on your bezel time to go up.That should do it . Rik the watchmaker

22 August 2009, 08:06 AM	#7
snow_rocks Banned Join Date: Feb 2009 Real Name: Rick Location: At what TIME?!!! Watch: the SKY tonite! Posts: 3,225	The minute markers used in the 15 minute range on the bezel is something Rolex has used since the '50s, and has been copied by other watch makers. Dive times were based on Navy dive tables at the time. The ascent can be timed with the minute markers, especially if stops are necessary for de-comp dives. Now, it is not necessary for this unique feature of the bezel for todays diving.

23 August 2009, 07:14 AM	#9
Blue Lantern "TRF" Member Join Date: Jul 2009 Location: Delaware Watch: Tudor 79190 Posts: 366	I was just reading about this on a Wikipedia page, under "Bezel markings": http://en.wikipedia.org/wiki/Diving_watch The explanation on the Wikipedia entry is based on a thread from the Watchuseek forums.

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