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Driving to altitude after diving.

Discussion in 'Basic Scuba Discussions' started by CUMBIAMAN, Jun 11, 2018.

  1. CUMBIAMAN

    CUMBIAMAN Angel Fish

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    The information I have found on the topic is rather inconclusive, but what would be the best approach in this diving scenario:

    1. Saturday, two tanks 50 min, 20 mts. Finishing time approx. 2 pm.
    2. Sunday, two tanks 50 min, 20 mts. Finishing time approx.. 2 pm.
    3. Mexico City is at 2300 mts over sea level.
    4. Driving from sea level takes 3-5 hrs. with a peak at 3000 mts.

    Is it safe to travel on Sunday back home?
     
  2. Scubagolf

    Scubagolf ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 200 - 499
    Location: Sacramento, California, USA
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    Per other posts on the subject, DAN's recommendation for flying or ascending to altitude assumes an elevation gain greater than 2,000 feet. You will be over 9,000 feet, which is like flying commercially in a pressurized cabin.
     
  3. Neilwood

    Neilwood Loggerhead Turtle

    # of Dives: 50 - 99
    Location: Scotland
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    @boulderjohn did a good post about altitude diving so it might be worth having a discussion with him.
     
  4. boulderjohn

    boulderjohn Technical Instructor ScubaBoard Supporter

    # of Dives: 1,000 - 2,499
    Location: Boulder, CO
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  5. Dave Bevan

    Dave Bevan DIR Practitioner

    # of Dives: 500 - 999
    Location: Jeddah, Saudi Arabia
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    I regularly do multiple dives and drive to an altitude of around 5500 feet. So does everyone else who dives out here. I've never known of anyone having a problem. However it's half the altitude you are talking about.
     
  6. JamesBon92007

    JamesBon92007 Great White

    # of Dives: 2,500 - 4,999
    Location: Southern California...too far from the ocean
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    We went diving in Kona but were staying in Hilo, Hawai'i and the trip back is over 8000 feet above sea level so, due to the lack of any definite information, we stayed overnight in Kona. It sure seems like it should be possible to have some kind of decompression stops along the way.
     
  7. runsongas

    runsongas Great White

    # of Dives: 500 - 999
    Location: California - Bay Area
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    treat the dives on sunday as altitude dives by increasing the depth you use for planning from 20m to 25m or 30m depending on how long before you hit the 3000m peak on the drive.
     
  8. dmaziuk

    dmaziuk Regular of the Pub

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    How safe/comforatble is it/you to drive through the night? Let's say you start out past 4 pm and take 8-10 hours instead of 3-5?
     
  9. Edward3c

    Edward3c Instructor, Scuba

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    BSAC have a set of altitude/atmospheric pressure tables, see here.

    Your diving at sea level was most likely to be at level 1.

    Saturday’s diving, even with mandatory deco stops can be discounted.

    Sunday’s diving:
    Setting off within 4 hours of surfacing is outside the tables.
    After 4 hours you can set off home, when home you will have another 9 hours to fully degas.
     
    boulderjohn likes this.

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