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Author Topic: Surface Interval Calculation  (Read 7518 times)

AngelFish

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Surface Interval Calculation
« on: 22 Jul 10, 20:17 »
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  • Most dive computer show the time since your last dive. Is there a dive computer that calculate your surface interval before your next dive? For example, after your first dive, the computer will indicate, how much time you need on the surface before you go for your next dive? Similar to the flight function.

    grbenji

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    Re: Surface Interval Calculation
    « Reply #1 on: 22 Jul 10, 23:27 »
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  • There is no fix limit for surface interval before you can do your next dive.  The shorter your surface interval, the higher the pressure group you will be in which will limited your next dive depth and bottom time.

    ndut

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    Re: Surface Interval Calculation
    « Reply #2 on: 23 Jul 10, 10:44 »
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  • unless you count them the other way around. i.e, you already decide how long and deep your next dive is, in which you could count the minimum surface time.
    I dunno if any dive comp can do this, tho
    no more will my green sea go turn a deeper blue

    DIN

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    Re: Surface Interval Calculation
    « Reply #3 on: 23 Jul 10, 11:30 »
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  • Its quite tricky. The computer need to know what is your next dive plan to be able to calculate. There is dive planner function on most computer but I am not sure if it for this purpose. I've never tried them though.
    Mola-Mola is a Myth

    Oraclescuba

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    Re: Surface Interval Calculation
    « Reply #4 on: 16 Aug 10, 04:57 »
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  • Hi Everyone

    Aswering to the above question is simple,

    Lets go back to our basic. When we learned during our open water , our instructor told us to plan our dive , not dive then plan. So basically dive computer is best to put as our back up unit . We should not depend on it as our important tool of our diving life.

    Secondly, in PADI Dive rules, that if you dive using a computer, you need a miminum surface interval of an hour! So we stay up for an hour is the minumum when u dive with computer!

    I dont know about other agency .. Cheer   

    No offence to anyone . ya !! 

    Scubabear

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    Re: Surface Interval Calculation
    « Reply #5 on: 24 Sep 10, 09:28 »
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  • Hi there,

    Like what all have mention, plan your dives using Dive table before you dive. Like what PADI teaches us.
    Else, if your from SDI, which is using computer as a planner.
    Computer like Suunto D4 onwards have dive log which state surface interval for the next dive. Dive plan that Calculate next dive Time and depth which you desire on.

    Hope it helps.
    Cheers!
    Rdgs,
    Darren

    Alvin Ho

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    Re: Surface Interval Calculation
    « Reply #6 on: 24 Sep 10, 10:07 »
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  • recommended surface interval is about an hour or more. not only to enhance safety, but also not to penalise your next dive, unless it's shallow. I've had surface intervals of less than an hour before, it's all about what your next dive is going to be.

    oh and i dive with 2 computers and a dive watch which shows depth/dive time and has dive time and rapid ascent alarms as well.  ;D
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    siaokao

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    Re: Surface Interval Calculation
    « Reply #7 on: 24 Sep 10, 17:05 »
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  • If you have an iphone, download iscuba plan.  The lite version is free and can calculate surface interval and help you plan your next dive accordingly.  :)
    So they call it a 'FACT' coz someone made some statements on a 'FACT SHEET'? hummm...

    thomssi

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    Re: Surface Interval Calculation
    « Reply #8 on: 28 Sep 10, 19:07 »
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  • Plan mode takes your current interval into account, that assumes you are on the point of jumping in though. None I have seen allow forward planning (ie if I dive in 45 mins what will it give me).