• Welcome to ScubaBoard


  1. Welcome to ScubaBoard, the world's largest scuba diving community. Registration is not required to read the forums, but we encourage you to join. Joining has its benefits and enables you to participate in the discussions.

    Benefits of registering include

    • Ability to post and comment on topics and discussions.
    • A Free photo gallery to share your dive photos with the world.
    • You can make this box go away

    Joining is quick and easy. Login or Register now by clicking on the button

deco planner software

Discussion in 'Dive Software' started by Frank Martin, Aug 4, 2017.

  1. sea_otter

    sea_otter DIR Practitioner

    # of Dives: 200 - 499
    Location: San Jose, CA
    323
    245
    43
    VPM +3 should give you approximately the same profile.
     
  2. Colin Schneider

    Colin Schneider Garibaldi

    # of Dives: 200 - 499
    Location: Phx
    2
    0
    1
  3. boulderjohn

    boulderjohn Technical Instructor ScubaBoard Supporter

    # of Dives: 1,000 - 2,499
    Location: Boulder, CO
    25,790
    17,408
    113
    Why are you using the v-planner? Why not just stay with Buhlmann?

    Edit: What I am actually saying is that I am confused as to why you are mixing algorithms.
     
    Last edited: Aug 24, 2017
  4. USMC CPL.

    USMC CPL. Barracuda

    # of Dives: I'm a Fish!
    Location: Lake Havasu city
    202
    50
    28
    If you don't mind let me know how it goes. I am looking at tec 40 next year.
     
  5. boulderjohn

    boulderjohn Technical Instructor ScubaBoard Supporter

    # of Dives: 1,000 - 2,499
    Location: Boulder, CO
    25,790
    17,408
    113
    If anyone is taking Tec 40 from me, any advice they got from random people on the Internet would be supplanted by the advice I gave in the class. Your instructor will go over all of this in class.
     
  6. BazzaB

    BazzaB Instructor, Scuba

    # of Dives: 500 - 999
    Location: Netherlands
    83
    45
    18
    Thats what I was thinking
     
  7. sea_otter

    sea_otter DIR Practitioner

    # of Dives: 200 - 499
    Location: San Jose, CA
    323
    245
    43
    Or advice received from random people on the internet could become good fuel to ask thoughtful questions. No reason to discourage discussion, imho.

    I don't know the exact limits of Tech 40, but at 130 ft for 20 minutes, without helium, there's a whole 30 seconds difference in the plan (VPM+3 vs GF30/70). At that level, it doesn't seem like a big deal to me if he's already bought vPlanner instead of MultiDeco. Of course the instructor may disagree. I am not familiar with the PADI curriculum.

    It was already mentioned earlier in the thread, but Subsurface is great free dive log and planning software that can do both VPM and Buhlmann. If you don't want to buy something new, definitely check that out.
     
  8. boulderjohn

    boulderjohn Technical Instructor ScubaBoard Supporter

    # of Dives: 1,000 - 2,499
    Location: Boulder, CO
    25,790
    17,408
    113
    PADI does not require any specific algorithm. If you are taking the class from me, there will be an extensive discussion of the differences between the most common ones today. I will have the students do a lot of outside reading. We will discuss the issues and ome to a decision as to what we will use for our planning. Yes, any studying the student did ahead of time will be both welcome and beneficial, but the decisions will be made during the class, not by the student alone before the class even begins.
     
  9. JohnnyC

    JohnnyC PADI Pro

    # of Dives: I'm a Fish!
    Location: United States
    3,392
    3,817
    113
    The discussion with your instructor should go over all of this and help you formulate your decision for which algorithm and what level of conservatism you will use.

    Just to illustrate some differences, here are 3 plans run in MultiDeco at VPM+3, GF 30/70, and GF 50/80. Depth and bottom time unchanged, air and backgas deco, only difference is the algorithm

    Decompression model: VPM - B

    DIVE PLAN
    Surface interval = 5 day 0 hr 0 min.
    Elevation = 0m
    Conservatism = + 3

    Dec to 40m (2) Air 15m/min descent.
    Level 40m 17:20 (20) Air 1.04 ppO2, 40m ead
    Asc to 21m (22) Air -9m/min ascent.
    Stop at 21m 0:53 (23) Air 0.65 ppO2, 21m ead
    Stop at 18m 1:00 (24) Air 0.59 ppO2, 18m ead
    Stop at 15m 2:00 (26) Air 0.52 ppO2, 15m ead
    Stop at 12m 4:00 (30) Air 0.46 ppO2, 12m ead
    Stop at 9m 5:00 (35) Air 0.40 ppO2, 9m ead
    Stop at 6m 8:00 (43) Air 0.34 ppO2, 6m ead
    Stop at 3m 15:00 (58) Air 0.27 ppO2, 3m ead
    Surface (59) Air -3m/min ascent.


    DIVE PLAN COMPLETE


    Decompression model: ZHL16-C + GF

    DIVE PLAN
    Surface interval = 5 day 0 hr 0 min.
    Elevation = 0m
    Conservatism = GF 30/70

    Dec to 40m (2) Air 15m/min descent.
    Level 40m 17:20 (20) Air 1.04 ppO2, 40m ead
    Asc to 18m (22) Air -9m/min ascent.
    Stop at 18m 0:33 (23) Air 0.59 ppO2, 18m ead
    Stop at 15m 1:00 (24) Air 0.52 ppO2, 15m ead
    Stop at 12m 2:00 (26) Air 0.46 ppO2, 12m ead
    Stop at 9m 4:00 (30) Air 0.40 ppO2, 9m ead
    Stop at 6m 6:00 (36) Air 0.34 ppO2, 6m ead
    Stop at 3m 16:00 (52) Air 0.27 ppO2, 3m ead
    Surface (53) Air -3m/min ascent.


    DIVE PLAN COMPLETE


    Decompression model: ZHL16-C + GF

    DIVE PLAN
    Surface interval = 5 day 0 hr 0 min.
    Elevation = 0m
    Conservatism = GF 50/80

    Dec to 40m (2) Air 15m/min descent.
    Level 40m 17:20 (20) Air 1.04 ppO2, 40m ead
    Asc to 15m (22) Air -9m/min ascent.
    Stop at 15m 0:13 (23) Air 0.52 ppO2, 15m ead
    Stop at 12m 1:00 (24) Air 0.46 ppO2, 12m ead
    Stop at 9m 2:00 (26) Air 0.40 ppO2, 9m ead
    Stop at 6m 5:00 (31) Air 0.34 ppO2, 6m ead
    Stop at 3m 11:00 (42) Air 0.27 ppO2, 3m ead
    Surface (43) Air -3m/min ascent.


    DIVE PLAN COMPLETE
     
    boulderjohn likes this.

Share This Page