Titanic tourist sub goes missing sparking search

[Orihimef]

I'd like to think that humans in general are good, I think it's really good that so many people tried to help. It's just sad that it was basically already over when they started. I always wondered if as humans we could some day have an underwater colony or something like that.

 

[wetb4igetinthewater]

I'd like to think that humans in general are good, I think it's really good that so many people tried to help. It's just sad that it was basically already over when they started. I always wondered if as humans we could some day have an underwater colony or something like that.

That's what Fabien is working on: PROTEUS | FCOLC. It was originally supposed to be built in Crete actually, but now is being built in Curacao.

 

[Dan]

Here is the right way to visit Titanic, done in twenty years ago.

 

[wetb4igetinthewater]

Here is the right way to visit Titanic, done in twenty years ago.

So I skipped around and there was discussion of how the Titanic will eventually completely decompose and collapse. While there was an announcement of 5 years ago that the Titanic would be laser scanned (the reports of a recent scanning is incorrect. The Voyis Observer camera (Observer and Nova Imaging Systems - Voyis) was used to take a massive number of pictures and that was put together to create a photogammetry model. That's not scanning but the media often writes that scuba cylinders are filled with oxygen, so we always have to wonder what did the rushed article author also get wrong.

I was hoping the Voyis Insight Pro (Insight Pro Underwater Laser Scanner - Voyis) be used mounted to either a submersible or a heavy ROV (preferable due to the the Titan disaster - not sure which one is rated to that depth). I have a competitors laser scanner (PL3200UW-LW Subsea Pipeline and Wide Area Subsea Laser Scanner) which is "only" rated to 3200 meters depth (the deepest part of the Aegean is a bit over 3500 meters, so it isn't like a large percentage of the sea floor can't be scanned). ROVs are not as sexy as submersibles/divers, so that reduces the Hollywood aspect of recording such expeditions.

There unfortunately is not any commercial motivation for conducting laser scanning of historical wrecks. Hopefully soon the value of laser scanning for underwater research is proven and more money is donated to such efforts.

So let's keep our fingers crossed that someone with deep pockets will want to fund such an effort.

 

[HalcyonDaze]

So I skipped around and there was discussion of how the Titanic will eventually completely decompose and collapse. While there was an announcement of 5 years ago that the Titanic would be laser scanned (the reports of a recent scanning is incorrect. The Voyis Observer camera (Observer and Nova Imaging Systems - Voyis) was used to take a massive number of pictures and that was put together to create a photogammetry model. That's not scanning but the media often writes that scuba cylinders are filled with oxygen, so we always have to wonder what did the rushed article author also get wrong.

I was hoping the Voyis Insight Pro (Insight Pro Underwater Laser Scanner - Voyis) be used mounted to either a submersible or a heavy ROV (preferable due to the the Titan disaster - not sure which one is rated to that depth). I have a competitors laser scanner (PL3200UW-LW Subsea Pipeline and Wide Area Subsea Laser Scanner) which is "only" rated to 3200 meters depth (the deepest part of the Aegean is a bit over 3500 meters, so it isn't like a large percentage of the sea floor can't be scanned). ROVs are not as sexy as submersibles/divers, so that reduces the Hollywood aspect of recording such expeditions.

There unfortunately is not any commercial motivation for conducting laser scanning of historical wrecks. Hopefully soon the value of laser scanning for underwater research is proven and more money is donated to such efforts.

So let's keep our fingers crossed that someone with deep pockets will want to fund such an effort.

So how exactly would laser scanning improve upon the recent image scan?

 

[Open Ocean Diver]

 

[wetb4igetinthewater]

So how exactly would laser scanning improve upon the recent image scan?

An insane amount of detail that you appreciate close up. Photogammetry falls apart close up.

With laser, you are talking about sub millimeter accuracy. The improvement in detail is huge.

 

[Still Kicking]

Is the scan something you can access and explore online or is it proprietary? I was hoping there was an interactive model but I could only find short video clips.

 

[azstinger11]

An insane amount of detail that you appreciate close up. Photogammetry falls apart close up.

With laser, you are talking about sub millimeter accuracy. The improvement in detail is huge.

Is the source data equally appreciably large?

 

[wetb4igetinthewater]

Is the source data equally appreciably large?

Yes. IIRC, the laser scanner guy on my project estimated half a petabyte for the Titanic. It is a big ship, and doing scans in 2 dimensions at 1 knot is going to take a number of hours. It is my hope that eventually, after studies are completed and get permission by the Greek government, we start putting the entire 3D point cloud online. I'm trying to get a sample one on the NGO website.

EDIT: I've hired EIVA to do the last bit of engineering and testing as laser scanners in the past have been stationary or mounted to submarines. Voyis was the first to mount to an ROV (the VideoRay Mission Specialist Defender). Now we are doing the same with the Newton Labs PL3200UW-LW.

To get quality/sharp/accurate data, you need a stable platform. The Defender isn't very big (I'm 205, 5'10" for reference).

The IMU (inertial measurement unit - what detects the change in movement) has to be precise (the one we are using goes for $60K) and the laser must move in a smooth motion.

This is where the EIVA software comes in. You program the area, depth, and speed and you "press go." A computer will determine adjustments faster and smoother than a human.

The EIVA guys think weve got something good here, but it takes some more engineering work. Not a lot of time though.