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John C. Ratliff's Recent Activity

  1. John C. Ratliff replied to the thread Question, vintage LP72 tank.

    Thanks Luis, I stand corrected. The "+" rating doesn't allow for overfilling a stamped 2250 psig tank, with a "+" rating, to be...

    Feb 15, 2020 at 12:36 PM
  2. John C. Ratliff replied to the thread Question, vintage LP72 tank.

    Your math is good, but your advise is not so good. It is not a good idea, especially for these ol' tanks, to overfill them on purpose....

    Feb 14, 2020 at 9:34 PM
  3. John C. Ratliff liked 12th Man's post in the thread Speaking of vintage equipment.

    I'm still wondering how they equalized their ears with those old masked. No place to squeeze your nose!

    Feb 14, 2020 at 7:06 PM
  4. John C. Ratliff attached a file to the thread Speaking of vintage equipment.

    Make a fist, orient fingers toward face, note that thumb and first finger's knuckle align, push up on the mask skirt with the thumb and...

    39423104815_7cc9fa0d5d_k.jpg 47161549191_5d94d299b2_k.jpg Feb 13, 2020 at 11:19 AM
  5. John C. Ratliff liked Scuba Lawyer's post in the thread Mistral?.

    I found a little mom and pop motorcycle and fender chrome shop in Santa Ana, CA. They know zero about diving or regulators, but I have...

    u03RXC.jpg dyyrKM.jpg Feb 13, 2020 at 11:14 AM
  6. John C. Ratliff liked Scuba Lawyer's post in the thread Mistral?.

    Mistral(s) are fantastic easy breathing bulletproof DH regs. At tank pressures below about 1500 psi they breathe easier than my Atomic!...

    BdFyIN.jpg FSHjzF.jpg Feb 13, 2020 at 11:12 AM
  7. John C. Ratliff liked herman's post in the thread Speaking of vintage equipment.

    Love those old promo shots. The reg in the photo is up side down. :)

    Feb 12, 2020 at 7:09 PM
  8. John C. Ratliff liked Bob DBF's post in the thread Freediving after scuba diving.

    Assuming your gas tension is at a safe level at the surface, if you submerge it changes. Now if you SCUBA dive you have tables or a...

    Feb 11, 2020 at 9:14 PM
  9. John C. Ratliff liked johndiver999's post in the thread Freediving after scuba diving.

    First, freediving does add to the inert gas load. So much so that very good freedivers will get bent from freediving alone if they...

    Feb 11, 2020 at 9:10 PM
  10. John C. Ratliff liked Scuba Lawyer's post in the thread Diving without a depth gauge.

    As I recall, I started to surface from an afternoon dive and saw my computer (a Suunto ML I think) was no longer strapped to my wrist. I...

    Feb 11, 2020 at 9:06 PM
  11. John C. Ratliff liked Bigbella's post in the thread Full Face Specialty - worth it?.

    While I generally agree with your take on inane specialty courses, and I didn't attend any (they didn't as yet exist); though, there are...

    Feb 11, 2020 at 9:01 PM
  12. John C. Ratliff replied to the thread Full Face Specialty - worth it?.

    I like what your ar saying here, but I am curious as to why, if professional divers are taught to breath deeply with a FFM, why...

    Feb 11, 2020 at 1:58 AM
  13. John C. Ratliff liked Akimbo's post in the thread Full Face Specialty - worth it?.

    Another issue to be aware of with FFMs is the tendency to breathe too shallow to adequately eliminate/ventilate CO2, especially with...

    Feb 11, 2020 at 1:48 AM
  14. John C. Ratliff liked Sh0rtBus's post in the thread Full Face Specialty - worth it?.

    Wow......as a primarily ffm diver....I almost feel sort of attacked by your comments. Somehow because I choose to dive a ffm, I'm...

    Feb 11, 2020 at 1:47 AM