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Why waste 15 quid? Visit it in VR for 10! :wink: I've done laser scanning, of a shipyard, where we also had photogrammetry. The difference is significant. Laser scanning is difficult to get accurate. Base point inaccuracy is what's messing up the data. But it's incredibly precise, i.e., every...

SAR services exist to search and rescue people. It's literally their whole raison d'etre. It's also normal for the armed forces to share their SAR resources in peacetime. So for me, no reason to complain about SAR services spending their efforts on a high-profile case, unless they abandoned...

Indeed, that is one of the scenarios that hasn't been well-tested through offshore applications. So fibers are still needed, even if the load is all-compressive, to keep cracks from growing above the size that can be bridged by the chemical reaction. If the amount of trapped air and salt is...

So t So they were working on the same things then, figures that lab experiments are always ahead of actual use. One major change was the addition of superplasticizers, which allowed for ultra-dry mixes, impossible to flow into shape otherwise. New generations of UHPC/RPC contain...

About as dense as aluminum, but can get to steel-like compressive strength if cured under heat and pressure. Not as great in tension, so it can't compete with carbon for surface boats. But they're starting to use it for offshore structures and have designed underwater housings for 3,000-6,000m...

Great tragedy. Not like anyone needed more reason to stay away from CFRP underwater. Excellent material, just not for that load profile. I used to work at a company that built deep submersibles. Steel, titanium and aluminum, with titanium performing the best. The reason is, the least hidden...

It is of course their own mistake... but you can't deny that certain dive agencies and zero-to-hero programs are selling exactly that as a dream. Where they stop short is telling their customers that the career is selling that dream.

That's how you become a millionaire dive pro! Building dive gear or managing a piece of PADI? Usually people looking for a "diving career" are looking for one where their job is actual diving, and that, sadly, starts to decline right at the DM->OWSI level.

I have about a dozen regs hanging on my bathroom door, now that all travel is banned and all. 1) Nothing breathes like an Atomic. I've tried top regs from Aqualung, Apeks, Scubapro, a few others, and it's still night and day. An Atomic set to the loosest setting is like being in a surface...

It's not common for industrially manufactured batteries for consumer use to burst into flames from charging. That is a much, much more rare event than, say, arcing wires. Most times an old home's electrics get overhauled in repair, one finds at least a couple electrical faults with char marks...

8:1 is instruction in name only as it is. It means the 0-2 naturals in the class already got it, 2-3 worst students will get just enough instructors attention not to die, and the rest are left to sink or swim. Might still beat them getting a set of second-hand gear and figuring it out on their...

Have to clarify, I never made that claim! I meant "touches the DM" as in teaching it, of course, not taking it. By far the longest course an instructor can teach, so few ever touch it. This is clearer in context, as I was responding to the question:

Nah, no career-focused instructor ever touches the DM. Worst course for your career: long, difficult, few certifications in the end. Becoming an instructor is much easier than that. You pay $1k for the IDC, pay $1k for a book you'll never open, pay $1k for the IE, do a magic dance, and shazam...

But just let me ask, what is it that you did expect - a salary, performance bonus, and some PADI stock options? If so, you should have joined up with Google in their awesome quest of changing some icons from green to cyan in the next Android release! They offer all of that and more...

Over the years, I've found there to be no point to using full sunscreen unless you want to show off something. A good compromise is to use light sunscreen over your neck for the first 2-3 days of your trip. That will let your body develop a basic tan (=sun protection) that will work for the...

Yes. That's why I referred to the best-achieved level of safety as just "tolerable", nothing better. The sea is inherently dangerous, more so than even the air. Limitations on portholes and openings below the freeboard deck greatly reduce sinking incidents that plague smaller boats, but these...

Chemical smoke kills quickly. It's not so much a matter of coughing and slow CO poisoning as could happen in a wood-only fire, as it is waking up with your blood already filled with CN, CO and HCl instead of O2. That is by the time heat or particulate smoke, the noticeable effects of a fire...

I wear three different computers. One monitors my left tank, the other my right tank, the third depends on the dive. Two of my computers are set for safe conservative diving, the backup is set for an aggressive GF 99 ascent with optimistic assumptions. If there is a problem that calls for a...

Carbon fiber fins or just about anything is seriously prone to breakage. So if you're not babying them and stepping all over your fins on the boat, it's definitely worth looking for the best carbon-free fins out there!

One would expect to hear "overkill". Except, in my personal opinion, it's rather the pony that is too cumbersome for rec diving. Small doubles, in comparison, are awesome. 2x6L HP beats 100+19 or even 80+19 every time, in terms of both reliability and comfort. Forget 100+19, it's more...