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And dive instructors tend to be young and not teach that long anyway.

I doubt Andy had any effect on the industry adopting neutrally buoyant instruction. And I'm skeptical about this Herculean effort. Please don't say look it up on scubaboard, as you said here: Failed CESA in OW Let's try to understand the basic rules of logic. If you say something exists, and...

To no surprise, statements, as they always do, when discussing the opposite ends of the agency quality spectrum go to the absurd. And of course the ridiculous statement of instructors who teach for GUE and PADI both decide to be incompetent when teaching under the PADI system. I wish the idea...

Come on guys, this is ScubaBoard. You all should be used to argumentum ad absurdum by now! :wink: :stirpot: :oops::p:rofl3:

That's not my impression though. Not the case with Big Blue (which I own). My last purchase was from Kraken. result helped me decide.

Do you care about output? Your choices are eitehr constant output and then off or a slope of output until it turns off.

It certainly is. The known check points can be used to recalibrate the IMU data. That takes some additional effort, but if the scientific use of the data warrant it, it can certainly be done and will greatly improve accuracy. A lot comes down to money. What is the precision required?

If that is the application, sure. If used by scientists, then... So Richard, I know about this topic morre than you, so sit down, class is about to begin A fixed line laser scanner like the Voyis Insight or the Newton Labs PL3200UW-LW generate scan data. This must be correlated to position...

It all depends on what you are doing with the data

There are two: Newton Labs and Voyis.

So there are limits to underwater laser scanning. The limits are: 1. Visibility 2. Ambient light. The answer to both is more power. But there are limits. Here's an image of a propeller scan performed in Lake Union last May.

So I do know something about GUE, but I'll still respond based upon how I stayed away initially due to the instructors at the PADI shop I was at that called them the "military of diving" which didn't sound like any fun to me. I made the mistake of staying away as a result for years until...

There is that internal memo stating that they should maybe look more closely into that shop.

An abuse of rule #6?

Does it work underwater?

Your talking about what the oil and gas industry have been successful at doing, but pretty much no one else. Voyis did seem to have something going, but they appear to have pivoted to photogrammetry only. To date, there are only three companies that make proper laser scanners.

You can improve your results with stereo photogammetry. It isn't so easy to do (I know one university that was looking into this without results). Check out the Voyis system.

Naw. Some people are so thin skinned they need a safe space to avoid merited criticism. Many folks in the DIR community are tired of the snowflakes crying about elitist attitudes, some of which is warranted (more from the past), some of it isn't. But they need to put on their big boy pants...

No different than the PADI pros with their own exclusive group.

My advice for DIR proponents who wish for the bad reputation/feelings to go away is to simply stop talking about it. Threads like these are counter productive. It took decades for the impact of GI3 to mostly die off. I say mostly as some DIR people will bring him up on occasion. Ideally...