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Teric & NDL obligation...

Discussion in 'Shearwater Research' started by mcpowell, Nov 21, 2018.

  1. mcpowell

    mcpowell Barracuda

    # of Dives: 100 - 199
    Location: Georgia
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    I see the adjustment setting on my Teric now:

    Settings>Deco>and scroll down to “Last Stop”. Choice is 10 or 20 feet.
     
  2. Norwegian Cave Diver

    Norwegian Cave Diver Barracuda

    # of Dives: 200 - 499
    Location: Calgary Alberta Canada
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    If you set your computer to do deco at 10 feet then the deco time could/should be less, and therefore the TTS could/should be less. But for most divers - not tech divers - that difference in deco time and TTS may be 1 or 2 minutes. That difference would be a very small amount of additional air/gas consumption if you were doing the stop at 20 feet.
     
  3. KenGordon

    KenGordon Rebreather Pilot

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    If there are actual stops the 3m vs 6m thing can make a significant difference in time, especially on air. However, the main difference is that the computer will get annoyed if you are above the 6m final stop so your options are limited even if the water conditions would allow a shallower stop. You can’t tell the actual ceiling depth once you are above that last stop.

    For a safety stop it doesn’t matter, there is no ceiling, just a period of time in the general vicinity. A safety stop is a fixed time, not a fixed ammount of off gassing, it takes the same time at 3m and 6m.

    Btw, although I don’t generally get to do my final stop at 3m I always set the computer that way, I know the TTS will be a lie but other computers want divers doing stops between 3 and 6 and not being able to go to 5 is a pain.
     
  4. Mike1967

    Mike1967 Manta Ray

    # of Dives: 50 - 99
    Location: Victoria, Australia
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    I don't get what you mean, isn't 5 between 3 and 6?
     
  5. taimen

    taimen Manta Ray

    # of Dives: 100 - 199
    Location: Europe
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    Well a Shearwater will let you clear your deco at 5 even if you have the last stop set at 6. Some other computers will go into error mode.
     
  6. Mike1967

    Mike1967 Manta Ray

    # of Dives: 50 - 99
    Location: Victoria, Australia
    665
    246
    43
    Oh ok, at 3 or 6 is different to "between 3 and 6".
     
  7. KenGordon

    KenGordon Rebreather Pilot

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    If you have you last stop set to 6 then 5 is too shallow, but everyone else will be at 4 or 5.
     
  8. KenGordon

    KenGordon Rebreather Pilot

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    Let’s say I just completed a stop at 9m, now I get to go to 6m, eventually I will be able to go to 3m. When can I go to 5m? Can I ignore the computer immediately? After 10 minutes?

    Stops are stops. If the last stop is at 6 you do the deco at 6.
     
  9. Mike1967

    Mike1967 Manta Ray

    # of Dives: 50 - 99
    Location: Victoria, Australia
    665
    246
    43
    Again, I have the Perdix but you can go to 5 no worries.
     
  10. taimen

    taimen Manta Ray

    # of Dives: 100 - 199
    Location: Europe
    653
    300
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    Sure, but if your intention is to end your dive with a safety stop at 5+-1, after mandatory deco, it is logical to plan your deco stop below that.
     

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