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Diver Training, Has It Really Been Watered Down???

Discussion in 'Basic Scuba Discussions' started by Lake Hickory Scuba, Jan 20, 2018.

  1. CT-Rich

    CT-Rich Solo Diver

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    You did see what I was referring to? I was responding to someone talking about a “square profile” on a dive with a max depth. “Square profile” means that they are calculating max bottom time based on NDL and what group they will exit the water as... I did mention entry, exit, turn pressure and destinations on the dive. That sounds like a plan to me. This dive on a single tank is a nothing burger from the perspective of dive tables.
     
    AfterDark likes this.
  2. CT-Rich

    CT-Rich Solo Diver

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    Do you bring a redundant TP roll? Planning is everything.....
     
    chillyinCanada and AfterDark like this.
  3. Jcp2

    Jcp2 Barracuda

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    With the current state of environmental services where I work, I’m sure some people wished they did. We have those boxy plastic TP holders with institutional grade paper, so my plan includes a visual check before committing to final deployment. :wink:
     
    AfterDark likes this.
  4. CT-Rich

    CT-Rich Solo Diver

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    Perfect is the enemy of good. If I scrubbed every dive because there was something unexpected in the water, I would be driving a lot and diving very little. Good planning is adaptive. If Flipper wants to play in the cove, I am not swimming past him because I planned on visiting the rock pile.
     
  5. The Chairman

    The Chairman Chairman of the Board

    # of Dives: I just don't log dives
    Location: Cave Country!
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    I teach the rule of 120 for dive planning. That and understanding/knowing your SAC and you can get a handle on the limiting factor in a dive PDQ.
     
    CT-Rich and AfterDark like this.
  6. ScubaWithTurk

    ScubaWithTurk Bubble Blowing Buddha

    # of Dives: 200 - 499
    Location: Al Ain, Abu Dhabi, UAE
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    Not sure I know the rule of 120. Can you elaborate please?
     
    chillyinCanada likes this.
  7. RainPilot

    RainPilot completey delusional scientology snowflake Staff Member

    # of Dives: I just don't log dives
    Location: UAE
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    Depth (in feet) and NDL added together come out to 120 (for air)

    Comes out roughly the same as the Navy Tables

    100' for 20 min, 50' for 70 min etc etc
     
  8. Searcaigh

    Searcaigh Chromodoris gordonii Staff Member ScubaBoard Supporter

    # of Dives: 1,000 - 2,499
    Location: Dubai, UAE
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    Brendon, Turk's been metricfied now you'll confuse him :eek:
     
  9. The Chairman

    The Chairman Chairman of the Board

    # of Dives: I just don't log dives
    Location: Cave Country!
    55,199
    22,307
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    And if it's EAN32, then we use the rule of 140.

    We never, ever dive on that rule. It's a sanity check and/or for a rough plan. Use the PDC that God gave you... er that you bought! :D :D :D
     
    RayfromTX likes this.
  10. Bob DBF

    Bob DBF Solo Diver

    # of Dives: I just don't log dives
    Location: NorCal
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    That's the most important part of my plan, everything else is orchestrated to that end. Diving a 120 locally the major limitation is getting out of the water before I'm hypothermic. Towards the end of the dive I'm always in the shallows close to the exit. Other times conditions are different and the dive is more work, I have to insure I'm at the exit with enough reserve energy to make a safe exit.

    In any dive there is a limiting factor, it's not always gas or NDL, and a good diver will know his limitations, then plans and acts accordingly.



    Bob
     
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