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    Rule of Thirds with Unequal SAC Rates & Dissimilar Tanks: How it Works. . .

    Hypothetical example of extreme differing SAC Rates and Dissimilar Cylinders showing that proper application of Third's Turn Volume still works:

    Given: 9 meter depth overhead cave dive.

    Diver...
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    Given you are an advanced diver with a 1 bar/min...

    Given you are an advanced diver with a 1 bar/min per ATA pressure Surface Consumption Rate for a particular tank, then all you need for multi-levels are the depths in ATA, the time you spent at each...
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    Modified Thirds,Turn-Around Pressure and Lost...

    Modified Thirds,Turn-Around Pressure and Lost Buddy Search Gas Availability Calculations are easier with a bar SPG too. . .

    Suppose you originally planned a wreck penetration starting with 200 bar...
  4. Non-Fixable Freeflow: Modulating/Feathering the Tank Valve to Breath

    The actual incident that happened:

    Cozumel 2006, my adjustment knob assembly on the second stage regulator blew-out resulting in a catastrophic nonfixable free-flow, on a single-tank dive at a...
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    Easy Partial Pressure Blending With a Bar Gauge

    [Gas Blending in Metric makes greater sense in learning and is a lot more intuitive as well. . .]

    Starting from an empty tank or set of tanks (5.5L or AL40 deco cylinder; and 11L or AL80 twinset...
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    Easy Scuba Maths In Metric

    [Or how an American Diver figured out the logical use of a Bar SPG]:

    How much easier & intuitive is it to work with "1 bar/min" Metric vs "14.5 psi/min equivalent" in US Imperial Units???

    My...
  7. Dangerous Allure of the Single Tank Deep Air Bounce Dive

    A 60 meter bounce dive on a single AL80/11litre per bar cylinder, you will need well over half a tank (130bar out of a full tank of 200bar) just to get both you & a buddy to the surface in an...
  8. Nicer resort ambiance at the Blue Lagoon --but...

    Nicer resort ambiance at the Blue Lagoon --but the best Open Circuit or CCR logistical support and gas blending supply of any land based or liveaboard dive-operation in all of Micronesia is at Truk...
  9. Spacecraft Recovery Operations Technician/Engineer

    Job Opening with SpaceX based in Los Angeles/Southern California (Elon Musk's "other Company besides Tesla Motor Cars"):
    Launch Vehicle/Booster Rocket and Un-Manned/Manned Capsule Recovery.
    ...
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    Just came back after my fourth visit in the past...

    Just came back after my fourth visit in the past year to the wrecks of Truk; again went with Truk Lagoon Dive Center/Truk Stop Hotel.

    Gas cost is now $0.035/ltr for O2 and $0.115/ltr for He...
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    The "Butcher's Bill" for myself -the only Open...

    The "Butcher's Bill" for myself -the only Open Circuit diver other than the Dive Guides last Jun/July's Bikini Atoll Expedition ($6.5k just for M/V Winward Liveaboard Charter alone): --gas costs for...
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    Look Mate . . .do yourself a proper history...

    Look Mate . . .do yourself a proper history lesson, and look for yourself where "apparently" those 25 year-old BSAC'88 tables got their NDL values from (original research into Multi-level...
  13. Some reources we have in the States: ALL...

    Some reources we have in the States:

    ALL PUBLICATIONS
    Archived Publications - Undersea and Hyperbaric Medical Society
    Forums - Undersea and Hyperbaric Medical Society
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    Attached link is my gas bill from my Nov-Dec trip...

    Attached link is my gas bill from my Nov-Dec trip last year to the Truk Stop Hotel, the best dive operation and technical dive support in all of Micronesia. Good doubles and deco bottles selection,...
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    AFAIK, "Battlefield Calculations" by Delia...

    AFAIK, "Battlefield Calculations" by Delia Milliron was one of the first "how to" monographs published in Quest magazine describing gas management method as taught by GUE, back when DIR Fundamentals...
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    "Sensahuma" & "hooman beans" aside;), this is...

    "Sensahuma" & "hooman beans" aside;), this is precisely the reason why few here in the States could explain how to do these calculations with Imperial OR Metric Units.

    The original monograph on...
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    Here's the same example using cumbersome US...

    Here's the same example using cumbersome US Imperial PSI Pressure Units (much worse and the reason I switched to the more sensible Metric System for Scuba Diving):

    Not at all intuitive or easy to...
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    SPG Calculations & Methodology For A Lost Buddy Search

    Suppose you originally planned a wreck penetration starting with 200 bar at the entrance, with an openwater Minimum Gas Reserve/Rock Bottom of 50 bar. So 200 minus 50 bar Minimum Gas equals 150 bar...
  19. Minimum Deco means Minimum Deco whether within...

    Minimum Deco means Minimum Deco whether within NDL's or exceeding them into Mandatory Deco (and where one would use full Ratio Deco implementation instead); Minimum Gas Reserve or "Rock Bottom" is...
  20. Obviously, it stands to reason that if the novice...

    Whereas Scuba Stew feels that:


    Now Stew is more or less talking from a "first training" perspective (I think) whereas you might be looking at it more from the perspective of advanced training...
  21. "You teach best what you most need to learn"...

    "You teach best what you most need to learn" -Richard Bach

    There is nothing more important or vital for the beginning/novice OW Diver to understand than proper breathing gas planning & management...
  22. And so . . .where's the methodology for gas...

    And so . . .where's the methodology for gas planning along with Ratio Deco in this supposed "easier answer"? Inductive overviews are fine for introductions, but deductively applying the method by...
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    There's nothing wrong with quick & easy somatic...

    There's nothing wrong with quick & easy somatic remedies/medications for sea sickness, but you can break the dependency on them over time with self-hypnosis/visualization only, building up in the...
  24. UTD is a common medical acronym term here in the...

    UTD is a common medical acronym term here in the states that stands for "Urinary Tract Disorder" :embarasse.

    However in this thread context it is the name of the new dive agency Unified Team...
  25. No . . ."like for like" comparisons for...

    No . . ."like for like" comparisons for "fairness" is irrelevant in this instance. There's nothing misleading about learning proper gas management before kitting-up & splashing in for the first time...
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