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understanding dive computer

Discussion in 'Computers, Gauges, Watches & Analyzers' started by pixieheart1, Sep 30, 2012.

  1. live_2_dive

    live_2_dive Contributor

    # of Dives: 100 - 199
    Location: Ft Walton Beach, FL
    No computer that I know of will tell you now long your surface interval HAS to be. You should know what surface interval you need from your planning.

    But if you haven't done what you're supposed to and planned your dive ahead of time, most computers will let you enter a planning mode and see what your NDL's are in b/w dives for a given surface interval

    PADI Rescue/DM 09100Z7445
    Dr Dive/Wet Dream/Sea Cobra/Y-Knot/H2OBelow

    Diving is my passion...I live to dive!
  2. djwang2000

    djwang2000 Registered

    I respectfully disagree with you -- the Oceanic manual has a distinct lack of words, instead opting for symbols and punctuation marks that seem to be inserted randomly and without any particular meaning :wink:. ... but you are right in that when there is actually a sentence (and I use that term lightly) it has 20 words -- too bad they are the wrong words...
  3. pixieheart1

    pixieheart1 New

    Thanks a bunch for your reply. I felt like I was missing a piece of the puzzle but your reply brought it all together. :)
  4. diverrex

    diverrex Solo Diver

    # of Dives: 500 - 999
    Location: LA - North Hollywood
    My Cobalt makes this very easy. After a dive, on the planning screen it will give you what your NDL would be at each depth in increments of 10 feet if you did the dive right then, or it allows you to enter a remaining SI time to see what the NDL's would be in say another 30, 40, 50 minutes etc.
  5. LowDrag

    LowDrag Contributor

    # of Dives: 100 - 199
    Location: Portland, Oregon
    I'm with you on the "read the manual" suggestion. No chit Sherlock!!! I did the online course DiveNav suggested for my Subgear XP-10 because the "manual" was on a disk and a pain to follow. The online course gave me some really good hands on plus a visual to combine the learning.
    DiveNav likes this.
  6. DivemasterDennis

    DivemasterDennis DivemasterDennis ScubaBoard Supporter

    # of Dives: 500 - 999
    Location: Lakewood, Colorado
    My computers, like most, give a pixel read out indicating nitrogen absorption. As an old school, or just old, guy, I still calculate pressure groups after surface intervals on many occasions, just to confirm computer data and residual nitrogen for planning successive dives. I think computers are terrific, but I also think divers should be able to calculate these thing from tables too. I think like all tools, not only reviewing manuals, but experience using them, will increase your proficiency and comfort with the computer.
  7. redacted

    redacted Guest

    How do you map between calculated pressure groups and your computer's tissue loading graphic?
  8. tadawson

    tadawson Solo Diver

    # of Dives: 50 - 99
    Location: Lewisville, Texas
    You would be amazed how many people don't think they should have to and just don't . . .

    - Tim
    DiveNav and chs8084 like this.
  9. LowDrag

    LowDrag Contributor

    # of Dives: 100 - 199
    Location: Portland, Oregon
    No not really...:cool2: Some just aren't that smart.
  10. Abdullah

    Abdullah Contributor

    # of Dives: 500 - 999
    Location: Abu Dhabi
    The Leonardo has a surface interval countdown timer on the main screen that starts ticking away when you've been at the surface a couple minutes. It doesn't plan anything, it's more of a cautionary tool to remind you before you leap into your next NDL dive. The Leonardo is a nice, easy to use, reliable computer for basic recreational diving. But, it's not designed to do detailed dive planning. Your RDP is the resource for that.

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