• Welcome to ScubaBoard


  1. Welcome to ScubaBoard, the world's largest scuba diving community. Registration is not required to read the forums, but we encourage you to join. Joining has its benefits and enables you to participate in the discussions.

    Benefits of registering include

    • Ability to post and comment on topics and discussions.
    • A Free photo gallery to share your dive photos with the world.
    • You can make this box go away

    Joining is quick and easy. Login or Register now by clicking on the button

How to use a diver watch bezel like a Rolex submariner????

Discussion in 'New Divers and Those Considering Diving' started by kempoman, Sep 13, 2011.

  1. kempoman

    kempoman Angel Fish

    7
    1
    0
    Hi, could anyone share here how to use it. I think there are 2 typed one is count down minutes and another type is count up, am i right?
     
    rx7diver likes this.
  2. EastTNDiver

    EastTNDiver Great White

    # of Dives: 200 - 499
    Location: Tennessee, USA
    3,995
    4,587
    0
    The only way I've ever used a dive watch bezel, was to set the bezel marker to the minute hand location upon entering the water to mark the time I started my dive. At any point during the dive, counting up from that position to the current time, would give me my bottom time. Obviously, you would have to make mental note if your dive exceeded an hour.

    I suppose you could also set the bezel marker to a future time if you have a target duration for your dive, but if something happens during your dive that forces you to miss your target, you may or may not remember your exact start time...stress can do funny things to your memory.
     
    Jax likes this.
  3. rhwestfall

    rhwestfall Solo Diver

    # of Dives: 200 - 499
    Location: "La Grande Ile"
    12,486
    11,294
    113
    'nuff said here - though I have never seen a "count down" bezel.... Use all of mine as elapsed time....
     
  4. Tortuga68

    Tortuga68 Divemaster

    # of Dives: 1,000 - 2,499
    Location: Puerto Galera, Philippines
    4,104
    841
    113
    This is a typical 'count down' bezel... in this case you set the marker at your desired bottom time - eg using the watch time shown, if you wanted 20 minutes BT, rotate the bezel so the marker is at the 6 - then the minute marks show the amount of time you've gone over by (if you did) and/or can be used to time your ascent (if it's a shortish one)

    142001casmb1.jpg

    If you try to use this type of bezel with the elapsed time method, it doesn't give you an accurate reading beyong 15 minutes - which is ok if you stay within NDL; not so good if you're in deco where a minute or two can have a big effect on your ascent schedule

    NB This type of bezel doesn't meet the standard for 'diver' watches, which must have a uni-directional bezel marked in minute intervals the full duration. You can still use the countdown method on any bezel though
     
    Last edited: Sep 14, 2011
  5. ajduplessis

    ajduplessis Solo Diver

    # of Dives: I'm a Fish!
    Location: dry land :-(
    3,256
    830
    113
    The count down is something new for me. Not sure if I like it thou.
     
  6. rhwestfall

    rhwestfall Solo Diver

    # of Dives: 200 - 499
    Location: "La Grande Ile"
    12,486
    11,294
    113
    I beg to differ as the watch face is.....

    from my perspective and learning from various activities - this is an "elapsed time" bezel - set the triangle on the start time and the minute hand displays the time from "start".

    guess we were taught different ways......
     
    gypsyjim likes this.
  7. fnfalman

    fnfalman Orca

    # of Dives: 200 - 499
    Location: Southern California, USA
    5,271
    725
    113
    Most dive watch bezels are unidirectional and count up. However, some do have count down features because the bezels can be turned one way or the other and usually there's a locking mechanism that keeps the bezel in place. An example would be the Omega PloProf.
     
  8. Tortuga68

    Tortuga68 Divemaster

    # of Dives: 1,000 - 2,499
    Location: Puerto Galera, Philippines
    4,104
    841
    113
    They don't meet the ISO standard then - see link below


    You're right, seems I mis-remembered that part: Diving watch - Wikipedia, the free encyclopedia


    You can do it either way - I'm just telling you why the minute markings on the bezel only go a quarter on the watch in the photo. If you use it as you say, you have to remember your target BT

    The other method is also in the above link, under the heading Bezel Markings
     
    Last edited: Sep 14, 2011
  9. rhwestfall

    rhwestfall Solo Diver

    # of Dives: 200 - 499
    Location: "La Grande Ile"
    12,486
    11,294
    113
    Excerpt (from above link): Once the minute hand reached the main-marker on the bezel the diver would begin his ascent to the surface. The 15 or 20 minute scale helped with timing the ascent and whatever safety stop the diver deemed necessary.

    Never considered that application... :coffee:
     
  10. gypsyjim

    gypsyjim I have an alibi ScubaBoard Supporter

    # of Dives: 500 - 999
    Location: capital region of New York
    33,234
    25,761
    113
    One thing I learned about dive bezels on watches, from working in the jewelery industry is that not all bezels "lock" well. Many look good, but should not be relied on for any actual diving, as it is way too easy to bump and move that bezel, one reason they should not be able to be moved "backwards" at all! If your watch bezel should move, it is far better that it be truly unidirectional and add fictional bottom time if bumped, than misplace actual bottom time.
     
    Searcaigh likes this.

Share This Page