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  1. scagrotto

    Macro...?

    Not in a general sense. The word may be better known to the general population as a result of photography (and of course there's macro/micro economics, macrobiotic diets, and other things), but I think photographers (mis?)appropriated it from science. In science macroscopic just refers to stuff...
  2. scagrotto

    Rule on hot showers after diving

    I hear that sort of advice a lot, but I'm skeptical. Let's say that I weigh 150 pounds (not since high school, but the math will be easier) and am mostly water. Let's also figure that my temperature has dropped to 95ºF (i.e. probably warm enough to safely ingest fluids) and I can ingest tea or...
  3. scagrotto

    12 boys lost in flooded Thai cave

    Since most of you know little or nothing about caves, here's some general info. You've heard of snow, haven't you? Thailand has a much higher average temperature than my neck of the woods so the rain in Thailand is warmer, on average, than rain in my neck of the woods but the rain isn't the...
  4. scagrotto

    12 boys lost in flooded Thai cave

    This incident happens to be very close to the 20th anniversary of a long (compared to typical cave rescues, not the one in Thailand) and difficult cave rescue in NY. There are huge differences between the two, with one of them being that the NY cave required no diving. Similarities include...
  5. scagrotto

    2 recent deaths where snorkelers happened to be using full face masks

    Not very good at reading comprehension, are you? I've done enough research to know that a lot of people *think* there's a problem with CO2 buildup, but all I've seen is a lot of references to the idea with nothing to back it up. A small number of snorkelers have died while using them, and a...
  6. scagrotto

    Instructor sentenced after diver's death

    So it's basically impossible to hire a dive guide in the UK? Does a course with a paid instructor also fall under those regulations?
  7. scagrotto

    2 recent deaths where snorkelers happened to be using full face masks

    I wouldn't reach that conclusion just based on 2 data points, but there's been a fair amount of anecdotal evidence that many others have had a problem, or at least thought they had a problem. If you look at the people who have difficulties I'd bet they have a number of things in common, and the...
  8. scagrotto

    Anything simpler than Open Water?

    Is the quarry you can't manage to get to Gilboa? Google Maps seem to think that it's only an hour away from Sylvania, so it doesn't seem like there should be hurdles so insurmountable that you can't manage to find a couple of days in May or June, before reaching the anniversary of your "early...
  9. scagrotto

    Burst disc failure leads to over $2000 in property damage

    It's not simply venting through "the side of the plug" that prevents this sort of problem. When pressurized gases escape from a container in only one direction there's force in an opposing direction that, if we were rocket scientists, we'd call thrust. Venting through the side, the end, or any...
  10. scagrotto

    Filmmaker Rob Stewart's family files wrongful death lawsuit

    I think a good rule of thumb is that what kind of accident you've had is determined by the cause of the accident rather than the location of the accident. Like the earlier example of DCS that doesn't present itself until a while after being back on the boat, I think it's extremely clear that...
  11. scagrotto

    N.C. Photographer Sues State Alleging Copyright Infringement of Shipwreck Images

    As near as I can tell there are a bunch of confused idiots in the NC legislature who have no concept of how copyright works. The NC law basically says that, because the wreck is in state waters and is owned by the state, photos and video of the wreck that are in the possession of the NC...
  12. scagrotto

    G7X Mark II question

    Hi Olivier, My current setup is a bit over 12 years old, so nearly prehistoric by digital standards, and it's not the Canon compact with the 3 flash settings. I'm trying to decide what to do for an upgrade, and the G7x ii has a lot going for it. I don't expect to take advantage of the fast...
  13. scagrotto

    G7X Mark II question

    Since the geniuses at Canon to hobble the camera's versatility by not including a hot shoe I'm wondering how much manual control of flash output they've provided. The compact Canon I've got now offers 3 power settings for the flash. They're indicated by a bar graph that suggests that they're...
  14. scagrotto

    Need Help selecting port for Canon T5i

    I think you're looking at a major challenge if you want to use that lens in a housing. If you don't already know, one of the cardinal rules for good UW photos is to get close and have as little water as possible between you and your subject. That means there's pretty much no reason an UW...
  15. scagrotto

    Beginner Photography Setup Questions

    You can get good stills with just natural light, depending on conditions - water clarity, depth, color correcting filters, post-processing. Regardless of shutter speed the exposure from a strobe can be 1/1000" or less, and the electronic shutter on some digital cameras will let you sync at very...
  16. scagrotto

    Dear DM's around the world...

    The usefulness of every post depends on the ability of the reader to think, and the more thinking the reader does the less a post has to say. Perhaps I should have said more. Maybe that's why the title said "around the world"? You don't think that all the DM's who could be better live and work...
  17. scagrotto

    Diving incident at Eagles Nest Sink

    If you were the guy who was supposed to meet them at 3PM would you assume they were "at the bottom" and already dead when they didn't show up on time? More importantly, should the guy who waited have made that assumption? Maybe the layout of the cave is such that failure to return guaranteed...
  18. scagrotto

    Dear DM's around the world...

    Reading is so hard, isn't it?
  19. scagrotto

    OWC eLearning vs Classroom

    When I took my OW class I got an old-fashioned thing called a "book". I also already had another book about diving, which I had read before the class started. Based on that I can't see how eLearning could have an advantage over a traditional class in terms of learning the material. OTOH, I see a...
  20. scagrotto

    Computer Panic!

    Of course I'm far from an expert on the fine points of electronics and coding, but I can't see any way that this was a one time simultaneous malfunction of each computer, so I have to think it's some kind of bug. If it was sensor errors the computers would have given incorrect depth readings...
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