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  1. Kevrumbo

    Bolt Snap Orientation

  2. Kevrumbo

    O2 better than 50% for single deco gas dives?

    The best indirect risk-benefit advice that I gleaned from all of @Dr Simon Mitchell 's posts over the years was that if you conservatively do extra long Oxygen deco stops -beyond the O2 Stop Time for whatever deco algorithm schedule prescription you use- it doesn't matter what you did earlier in...
  3. Kevrumbo

    SAC Rate

    I think this is a better arithmetic example to understand, using AL80 cylinders to calculate: Example: Given a Volume Sac Rate of 22 liters/min per ATA, divide it by the Tank Factor Rating of the Cylinder in use. For an AL80 cylinder with a metric tank factor rating of 11 liters/bar: 22...
  4. Kevrumbo

    Helium prices ...

    Pacific Wilderness Dive Shop San Pedro (Port of Los Angeles): Helium $3.00 per Cubic Foot Oxygen $.50 per Cubic Foot O2 Clean Air $.10 per Cubic Foot
  5. Kevrumbo

    In Toby this weekend

    And Drysuit heated undergarment with heated glove insert liners under drygloves -for the so-called “wussies” from SoCal:cool:!
  6. Kevrumbo

    In Toby this weekend

    (Mod edit)... ...I had a nice time in Tobermory, Kingston, Toronto, St Catharines, Niagara Falls, Brockville and Cornwall ON Canada, and will return again -not so much for the cold & gray water diving- but for all the great Ontario Diver Friends & Boat Crews I met. . . Beautiful Country up...
  7. Kevrumbo

    SAC Rate

    It's easier to fundamentally explain and conceptualize the rated volume and service pressure of a scuba cylinder based on the standard European/Asian surface atmosphere reference convention of 1 bar: The common AL80 tank has a metric cylinder rating factor of 11 liters/bar, or in other words, at...
  8. Kevrumbo

    Updated 2018 - Emergency Equipment to assist Search & Rescue

    This is an example of a common scenario that will test the experience of your skiff driver to find and pick you up before deteriorating into a worst case lost-at-sea situation; Surfacing post-drift dive into a momentary tropical rain squall in near zero visibility: Currently by itself, a...
  9. Kevrumbo

    PLBs Can Save Your Life

    Again for the gazillionth time @Dan_T, @JohnnyC . . .the Lost-at-Sea/Adrift/Missing Diver Scenario is a special case of the classic Man Overboard contingency. Using MOB devices in the VHF radio frequency range designed for immediate recovery of blue water sailors and open ocean racing yacht...
  10. Kevrumbo

    Accident & Incident Discussion - Northernone - aka Cameron Donaldson

    A worst case solo scenario is being suddenly "clotheslined" by unseen monofilament line/net while on DPV trigger scootering forward. That's the only way that a diver of Cameron's experience -other than an unforeseen "medical event"- could have been so completely caught unaware and potentially...
  11. Kevrumbo

    Aluminum 80 tank has more liters than steel 80 tank?

    It's easier to fundamentally explain and conceptualize the rated volume and service pressure of a scuba cylinder based on the European/Asian surface atmosphere reference convention of 1 bar: The common AL80 tank has a metric cylinder rating factor of 11 liters/bar, or in other words, at the...
  12. Kevrumbo

    Diver’s Day at Long Beach Aquarium of the Pacific

    18th Annual (and especially today if your scheduled dive trips are cancelled because of weather): Divers Day
  13. Kevrumbo

    Any recommendation for tec dive shop in Subic Bay?

    Boardwalk Scuba Center for dive ops, equipment and gas.blending support, and Sam Collett coming from Tech Asia Puerto Galera for one of his scheduled classes as your Technical Wreck Instructor (Technical Diving in the Philippines | Tech Asia , Puerto Galera). IMO, there is no other resident...
  14. Kevrumbo

    Turn pressures

    Recreational -Minimum Gas Reserve (MGR) Planning, "CAT" vs old "Rock Bottom": Using the new GUE acronym "CAT" formula [Consumption x Avg ATA x Time] at 100'/30m depth within NDL in open water for example: Emergency Contingency plan requiring gas sharing at 100'/30m, with 1min to problem-solve...
  15. Kevrumbo

    Current opinions on Padi Tec-rec?

    There is a fundamental and dangerous flaw not taken into account in the whole PADI Tec 40/45/50 course progression & certification to begin with: The Density of Bottom Gas Nitrox 24% to 21% for a max working ppO2 of 1.2 bar is 6 g/L and higher, with Tec 50 on Air a whopping 7.2 g/L. (Refer to...
  16. Kevrumbo

    Let's all complain about the weather

    Went to work today this Friday morning 5am, drying out in between rainstorm weather fronts here in Harbor Gateway (midway between the city and the southern Port of Los Angeles/San Pedro) and the low temperature was 7° (that’s 7 degrees Celsius). (Things could be worse Phil -like right now in...
  17. Kevrumbo

    Gas Management / Made Simple

    A better cause to donate at 100%, and a more legitimate & longer serving charity serving US armed forces disabled veterans of all generations -and also created & established by the US Congress- is the Disabled American Veterans: Disabled American Veterans - History All you need for basic gas...
  18. Kevrumbo

    "Changing towel/robe" for boat coat?

    The above plus an optional neoprene surface hooded jacket as needed, that I see a lot of the SE Asia/Micronesia Dive Guides use. For a long length changing towel/garment to get out of wet swimsuits underneath, we tropical Asian Divers typically use a Sarong/Pareo/Batik (or short "Lava-Lava" as...
  19. Kevrumbo

    Safest locales for diving around the world?

    (Really. @KenGordon . . .In the World): Are all these "so-called publicly funded" Recompression Chambers in England/Scotland on emergency stand-by all 365 days-a-year and crewed 24/7 exclusively for the treatment of civilian recreational diving accidents & casualties only as the Catalina...
  20. Kevrumbo

    Safest locales for diving around the world?

    In terms of Diving Accident Emergency Support & Response, there is no better safer locale in the world than here in SoCal: The Catalina Recompression Chamber is the only non-military/non-commercial, civilian municipal government run and local diver donation/volunteer supported facility in the...
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