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SDI and Dive Tables

Discussion in 'SDI/TDI/ERDI' started by CAPTAIN SINBAD, Jan 9, 2018.

  1. flatfoot40

    flatfoot40 Angel Fish

    # of Dives: 200 - 499
    Location: Chicago
    37
    7
    8
    I took a TDI nitrox course and in the manual, "Understanding Nitrox" the tables are in the back. The instructor also used and went over the tables.
     
  2. Vicko

    Vicko Barracuda

    # of Dives: 50 - 99
    Location: Komizža, Croatia
    309
    226
    43
    They had them in the 2008 owd video, and the tests used in Croatia still have around 5-10 questions based on them.
     
  3. abnfrog

    abnfrog Tech Instructor

    # of Dives: 2,500 - 4,999
    Location: great white north
    1,372
    835
    113
    you can just mention we used to use them now we use computers , but if you want to you can get in-depth I usually teach a single dive dive profile...........but that's just the way I do it I believe students need to understand the tables
     
  4. sheeper

    sheeper Public Safety Diver

    # of Dives: 5,000 - ∞
    Location: Vero Beach, Florida, United States
    1,196
    609
    113
    any good SDI instructor will include some teaching of tables. I explain tables and how they relate to dive computers in my OW classes.
    Tables are important but who dives a square profile anyway?
    :scubinq:
     
    N2DeepInAz likes this.
  5. Coldbloodeddivers

    Coldbloodeddivers Banned

    # of Dives: I just don't log dives
    Location: Flordia
    15
    1
    3
    Agreed. Need to know tables.
     
  6. GreggS

    GreggS Barracuda

    # of Dives: 200 - 499
    Location: Thomasville, NC
    489
    202
    43
    When did this change. I did my SDI OW in 2014 and my OW packet had the tables included. And while they were mentioned in the classroom, the instructor didn't go over them. I still have mine but have only rarely even looked at them.
     
  7. Vicko

    Vicko Barracuda

    # of Dives: 50 - 99
    Location: Komizža, Croatia
    309
    226
    43
    Just checked, found them in instructor course guidlines as mandatory, 2015 edition.
     
  8. abnfrog

    abnfrog Tech Instructor

    # of Dives: 2,500 - 4,999
    Location: great white north
    1,372
    835
    113
    mandatory to give not teach sdi is computer based ow course that's why you get us navy tables
     
  9. ScottFL78

    ScottFL78 Nassau Grouper

    # of Dives: 100 - 199
    Location: Orlando, FL
    89
    37
    18
    I rarely post, but tables have been on my mind recently. Hey Paul! So I want some small pocket-sized tables to use for dive planning. Obviously my cheap Mares Puck Pro doesn't have the same algorithm of a basic table so once you begin diving for the day your plan for follow-on dives will change. I do like however having tables to plan dives and I think that knowing the science is important.

    So my question is: Which tables should I use (Nitrox)? Most people that I seem to have NAUI or PADI 32 and 36% tables that they use. They are a little different from eachother if I remember correctly. SDI/TDI seems to advocate using the Navy tables with the Equivalent Air Depth of your Nitrox blend (derived from a separate table). It is an extra step in reading the tables but no big deal to me. I was taught briefly how to read tables during the classroom review of my Open Water, Nitrox and Advanced course but none of that brief training would make me an expert. It was sufficient to me personally. So I saw a guy on youtube who said that theoretically you have to use the table from the agency who certified you or you are violating your certification. It makes sense to me but of course nowadays we could plan a dive off of anyones tables, but our computers will give us our no deco time regardless. So to me personally I see the tables as a good planning tool and as a back-up in case of computer malfunction but before I continue in my dive training I just want to make sure that I am doing it right. No pun intended haha. Thanks!
     
  10. Steve_C

    Steve_C Divemaster

    # of Dives: 500 - 999
    Location: Raleigh, NC USA
    4,080
    2,647
    113
    I did SDI. I have their tables. My class was 20-40% and the tables accommodated that. There was also a MOD table at the bottom for 1.4 and 1.6. (listed all the % from 20 to 40 and gave the MOD for that % at that PO2). I like an extra margin so took the formulas from the book and added another line for 1.2. I sometimes dive 30%. Or you may get a mix is off and need to do a quick check if is ok.

    I am certified for Nitrox. Not for a table and not for some fixed values of 32 or 36.
     

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